21023133102 has 24 divisors (see below), whose sum is σ = 46229976936. Its totient is φ = 6903117936.

The previous prime is 21023133083. The next prime is 21023133161. The reversal of 21023133102 is 20133132012.

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 11 ways as a sum of consecutive naturals, for example, 8714853 + ... + 8717264.

It is an arithmetic number, because the mean of its divisors is an integer number (1926249039).

Almost surely, 2^21023133102 is an apocalyptic number.

21023133102 is an abundant number, since it is smaller than the sum of its proper divisors (25206843834).

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

21023133102 is a wasteful number, since it uses less digits than its factorization.

21023133102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17432192 (or 17432189 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21023133102 its reverse (20133132012), we get a palindrome (41156265114).

The spelling of 21023133102 in words is "twenty-one billion, twenty-three million, one hundred thirty-three thousand, one hundred two".