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21112000100 = 22521911111579
BaseRepresentation
bin10011101010010111…
…111000111001100100
32000111022221201121122
4103222113320321210
5321214133000400
613410531233112
71345114016462
oct235227707144
960438851548
1021112000100
118a541a0174
124112448798
131cb5b9a669
141043c69832
158386c2685
hex4ea5f8e64

21112000100 has 36 divisors (see below), whose sum is σ = 48224257200. Its totient is φ = 8000336160.

The previous prime is 21112000097. The next prime is 21112000109. The reversal of 21112000100 is 100021112.

It is not an unprimeable number, because it can be changed into a prime (21112000109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5553890 + ... + 5557689.

It is an arithmetic number, because the mean of its divisors is an integer number (1339562700).

Almost surely, 221112000100 is an apocalyptic number.

21112000100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112000100 is an abundant number, since it is smaller than the sum of its proper divisors (27112257100).

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

21112000100 is a wasteful number, since it uses less digits than its factorization.

21112000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111612 (or 11111605 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21112000100 its reverse (100021112), we get a palindrome (21212021212).

The spelling of 21112000100 in words is "twenty-one billion, one hundred twelve million, one hundred", and thus it is an aban number.

Divisors: 1 2 4 5 10 19 20 25 38 50 76 95 100 190 380 475 950 1900 11111579 22223158 44446316 55557895 111115790 211120001 222231580 277789475 422240002 555578950 844480004 1055600005 1111157900 2111200010 4222400020 5278000025 10556000050 21112000100