21010312110 has 32 divisors (see below), whose sum is σ = 50432402592. Its totient is φ = 5601899520.

The previous prime is 21010312091. The next prime is 21010312133. The reversal of 21010312110 is 1121301012.

It is a super-2 number, since 2×21010312110² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

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, 162090 + ... + 261330.

It is an arithmetic number, because the mean of its divisors is an integer number (1576012581).

Almost surely, 2^21010312110 is an apocalyptic number.

21010312110 is an abundant number, since it is smaller than the sum of its proper divisors (29422090482).

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

21010312110 is a wasteful number, since it uses less digits than its factorization.

21010312110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106308.

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

Adding to 21010312110 its reverse (1121301012), we get a palindrome (22131613122).

The spelling of 21010312110 in words is "twenty-one billion, ten million, three hundred twelve thousand, one hundred ten".