21012331113102 has 32 divisors (see below), whose sum is σ = 48028758815232. Its totient is φ = 6003451498464.

The previous prime is 21012331113091. The next prime is 21012331113161. The reversal of 21012331113102 is 20131113321012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624568 + ... + 6512660.

It is an arithmetic number, because the mean of its divisors is an integer number (1500898712976).

Almost surely, 2^{21012331113102} is an apocalyptic number.

21012331113102 is an abundant number, since it is smaller than the sum of its proper divisors (27016427702130).

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

21012331113102 is a wasteful number, since it uses less digits than its factorization.

21012331113102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5973072.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21012331113102 its reverse (20131113321012), we get a palindrome (41143444434114).

The spelling of 21012331113102 in words is "twenty-one trillion, twelve billion, three hundred thirty-one million, one hundred thirteen thousand, one hundred two".