21103103320 has 64 divisors (see below), whose sum is σ = 51150708000. Its totient is φ = 7789436928.

The previous prime is 21103103261. The next prime is 21103103381. The reversal of 21103103320 is 2330130112.

It is a junction number, because it is equal to n+sod(n) for n = 21103103294 and 21103103303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2814136 + ... + 2821624.

Almost surely, 2^21103103320 is an apocalyptic number.

21103103320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21103103320 is an abundant number, since it is smaller than the sum of its proper divisors (30047604680).

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

21103103320 is a wasteful number, since it uses less digits than its factorization.

21103103320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12932 (or 12928 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21103103320 its reverse (2330130112), we get a palindrome (23433233432).

The spelling of 21103103320 in words is "twenty-one billion, one hundred three million, one hundred three thousand, three hundred twenty".