21012321031110 has 48 divisors (see below), whose sum is σ = 54947826829584. Its totient is φ = 5570896670016.

The previous prime is 21012321031103. The next prime is 21012321031157. The reversal of 21012321031110 is 1113012321012.

21012321031110 is a `hidden beast` number, since 2 + 10 + 12 + 321 + 0 + 311 + 10 = 666.

It is a super-2 number, since 2×21012321031110² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 674753892 + ... + 674785031.

It is an arithmetic number, because the mean of its divisors is an integer number (1144746392283).

Almost surely, 2^{21012321031110} is an apocalyptic number.

21012321031110 is an abundant number, since it is smaller than the sum of its proper divisors (33935505798474).

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

21012321031110 is a wasteful number, since it uses less digits than its factorization.

21012321031110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349539109 (or 1349539106 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21012321031110 its reverse (1113012321012), we get a palindrome (22125333352122).

The spelling of 21012321031110 in words is "twenty-one trillion, twelve billion, three hundred twenty-one million, thirty-one thousand, one hundred ten".