21010111112010 has 32 divisors (see below), whose sum is σ = 50425172208000. Its totient is φ = 5602595681088.

The previous prime is 21010111111987. The next prime is 21010111112027. The reversal of 21010111112010 is 1021111101012.

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, 4582510 + ... + 7938489.

It is an arithmetic number, because the mean of its divisors is an integer number (1575786631500).

Almost surely, 2^{21010111112010} is an apocalyptic number.

21010111112010 is an abundant number, since it is smaller than the sum of its proper divisors (29415061095990).

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

21010111112010 is a wasteful number, since it uses less digits than its factorization.

21010111112010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12576942.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21010111112010 its reverse (1021111101012), we get a palindrome (22031222213022).

The spelling of 21010111112010 in words is "twenty-one trillion, ten billion, one hundred eleven million, one hundred twelve thousand, ten".