21010111022010 has 64 divisors (see below), whose sum is σ = 56287553287680. Its totient is φ = 4974910006080.

The previous prime is 21010111021969. The next prime is 21010111022027. The reversal of 21010111022010 is 1022011101012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 740299800 + ... + 740328179.

It is an arithmetic number, because the mean of its divisors is an integer number (879493020120).

Almost surely, 2^{21010111022010} is an apocalyptic number.

21010111022010 is an abundant number, since it is smaller than the sum of its proper divisors (35277442265670).

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

21010111022010 is a wasteful number, since it uses less digits than its factorization.

21010111022010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480628043.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21010111022010 its reverse (1022011101012), we get a palindrome (22032122123022).

The spelling of 21010111022010 in words is "twenty-one trillion, ten billion, one hundred eleven million, twenty-two thousand, ten".