21023212032102 has 16 divisors (see below), whose sum is σ = 48053056073472. Its totient is φ = 6006632009160.

The previous prime is 21023212032061. The next prime is 21023212032103. The reversal of 21023212032102 is 20123021232012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023212032103) 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, 250276333674 + ... + 250276333757.

It is an arithmetic number, because the mean of its divisors is an integer number (3003316004592).

Almost surely, 2^{21023212032102} is an apocalyptic number.

21023212032102 is an abundant number, since it is smaller than the sum of its proper divisors (27029844041370).

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

21023212032102 is a wasteful number, since it uses less digits than its factorization.

21023212032102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500552667443.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21023212032102 its reverse (20123021232012), we get a palindrome (41146233264114).

The spelling of 21023212032102 in words is "twenty-one trillion, twenty-three billion, two hundred twelve million, thirty-two thousand, one hundred two".