21031223013102 has 32 divisors (see below), whose sum is σ = 42960215692800. Its totient is φ = 6860799004608.

The previous prime is 21031223013089. The next prime is 21031223013103. The reversal of 21031223013102 is 20131032213012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031223013103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1859274 + ... + 6746802.

It is an arithmetic number, because the mean of its divisors is an integer number (1342506740400).

Almost surely, 2^{21031223013102} is an apocalyptic number.

21031223013102 is an abundant number, since it is smaller than the sum of its proper divisors (21928992679698).

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

21031223013102 is a wasteful number, since it uses less digits than its factorization.

21031223013102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902840.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21031223013102 its reverse (20131032213012), we get a palindrome (41162255226114).

The spelling of 21031223013102 in words is "twenty-one trillion, thirty-one billion, two hundred twenty-three million, thirteen thousand, one hundred two".