21010022110 has 32 divisors (see below), whose sum is σ = 47149765632. Its totient is φ = 6548578080.

The previous prime is 21010022063. The next prime is 21010022123. The reversal of 21010022110 is 1122001012.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 13642102 + ... + 13643641.

It is an arithmetic number, because the mean of its divisors is an integer number (1473430176).

Almost surely, 2^21010022110 is an apocalyptic number.

21010022110 is an abundant number, since it is smaller than the sum of its proper divisors (26139743522).

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

21010022110 is a wasteful number, since it uses less digits than its factorization.

21010022110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27285768.

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

Adding to 21010022110 its reverse (1122001012), we get a palindrome (22132023122).

The spelling of 21010022110 in words is "twenty-one billion, ten million, twenty-two thousand, one hundred ten".