21102010120 has 64 divisors (see below), whose sum is σ = 48103557120. Its totient is φ = 8330563584.

The previous prime is 21102010117. The next prime is 21102010141. The reversal of 21102010120 is 2101020112.

It is a super-2 number, since 2×21102010120² (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 a junction number, because it is equal to n+sod(n) for n = 21102010097 and 21102010106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 969679 + ... + 991201.

It is an arithmetic number, because the mean of its divisors is an integer number (751618080).

Almost surely, 2^21102010120 is an apocalyptic number.

21102010120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102010120 is an abundant number, since it is smaller than the sum of its proper divisors (27001547000).

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

21102010120 is a wasteful number, since it uses less digits than its factorization.

21102010120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21854 (or 21850 counting only the distinct ones).

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

Adding to 21102010120 its reverse (2101020112), we get a palindrome (23203030232).

The spelling of 21102010120 in words is "twenty-one billion, one hundred two million, ten thousand, one hundred twenty".