21103103120 has 80 divisors (see below), whose sum is σ = 54770012352. Its totient is φ = 7495380480.

The previous prime is 21103103117. The next prime is 21103103123. The reversal of 21103103120 is 2130130112.

It is an interprime number because it is at equal distance from previous prime (21103103117) and next prime (21103103123).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×21103103120² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21103103095 and 21103103104.

It is not an unprimeable number, because it can be changed into a prime (21103103123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241007 + ... + 316686.

Almost surely, 2^21103103120 is an apocalyptic number.

21103103120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21103103120 is an abundant number, since it is smaller than the sum of its proper divisors (33666909232).

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

21103103120 is a wasteful number, since it uses less digits than its factorization.

21103103120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557760 (or 557754 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21103103120 its reverse (2130130112), we get a palindrome (23233233232).

The spelling of 21103103120 in words is "twenty-one billion, one hundred three million, one hundred three thousand, one hundred twenty".