21102023310 has 16 divisors (see below), whose sum is σ = 50644856016. Its totient is φ = 5627206208.

The previous prime is 21102023287. The next prime is 21102023311. The reversal of 21102023310 is 1332020112.

It is a super-2 number, since 2×21102023310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21102023310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102023311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351700359 + ... + 351700418.

It is an arithmetic number, because the mean of its divisors is an integer number (3165303501).

Almost surely, 2^21102023310 is an apocalyptic number.

21102023310 is an abundant number, since it is smaller than the sum of its proper divisors (29542832706).

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

21102023310 is a wasteful number, since it uses less digits than its factorization.

21102023310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703400787.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21102023310 its reverse (1332020112), we get a palindrome (22434043422).

The spelling of 21102023310 in words is "twenty-one billion, one hundred two million, twenty-three thousand, three hundred ten".