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21010211200 = 2752115691049
BaseRepresentation
bin10011100100010011…
…100110000110000000
32000020020102022111101
4103210103212012000
5321012103224300
613352453424144
71342436564026
oct234423460600
960206368441
1021010211200
118a01797710
1240a433b054
131c9aa7b844
141034530716
1582e7b7b6a
hex4e44e6180

21010211200 has 192 divisors, whose sum is σ = 56773710000. Its totient is φ = 7619379200.

The previous prime is 21010211197. The next prime is 21010211227. The reversal of 21010211200 is 211201012.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20028276 + ... + 20029324.

Almost surely, 221010211200 is an apocalyptic number.

21010211200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21010211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28386855000).

21010211200 is an abundant number, since it is smaller than the sum of its proper divisors (35763498800).

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

21010211200 is a wasteful number, since it uses less digits than its factorization.

21010211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653 (or 1636 counting only the distinct ones).

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

Adding to 21010211200 its reverse (211201012), we get a palindrome (21221412212).

The spelling of 21010211200 in words is "twenty-one billion, ten million, two hundred eleven thousand, two hundred".