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21112120000 = 2654527803
BaseRepresentation
bin10011101010011000…
…010110001011000000
32000111100011211002101
4103222120112023000
5321214200320000
613410534000144
71345115026156
oct235230261300
960440154071
1021112120000
118a54272264
1241124a6054
131cb5c100ca
141043c9b3d6
158386e7e6a
hex4ea6162c0

21112120000 has 70 divisors (see below), whose sum is σ = 52351295348. Its totient is φ = 8444832000.

The previous prime is 21112119989. The next prime is 21112120019. The reversal of 21112120000 is 2121112.

It is a super-2 number, since 2×211121200002 (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 223902 + ... + 303901.

Almost surely, 221112120000 is an apocalyptic number.

21112120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112120000 is an abundant number, since it is smaller than the sum of its proper divisors (31239175348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112120000 is an frugal number, since it uses more digits than its factorization.

21112120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527835 (or 527810 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21112120000 its reverse (2121112), we get a palindrome (21114241112).

The spelling of 21112120000 in words is "twenty-one billion, one hundred twelve million, one hundred twenty thousand".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 160 200 250 320 400 500 625 800 1000 1250 1600 2000 2500 4000 5000 8000 10000 20000 40000 527803 1055606 2111212 2639015 4222424 5278030 8444848 10556060 13195075 16889696 21112120 26390150 33779392 42224240 52780300 65975375 84448480 105560600 131950750 168896960 211121200 263901500 329876875 422242400 527803000 659753750 844484800 1055606000 1319507500 2111212000 2639015000 4222424000 5278030000 10556060000 21112120000