21023203221102 has 128 divisors (see below), whose sum is σ = 48529168035840. Its totient is φ = 6027497349120.

The previous prime is 21023203221077. The next prime is 21023203221109. The reversal of 21023203221102 is 20112230232012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023203221109) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18245418 + ... + 19363410.

It is an arithmetic number, because the mean of its divisors is an integer number (379134125280).

Almost surely, 2^{21023203221102} is an apocalyptic number.

21023203221102 is an abundant number, since it is smaller than the sum of its proper divisors (27505964814738).

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

21023203221102 is a wasteful number, since it uses less digits than its factorization.

21023203221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118378.

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

Adding to 21023203221102 its reverse (20112230232012), we get a palindrome (41135433453114).

The spelling of 21023203221102 in words is "twenty-one trillion, twenty-three billion, two hundred three million, two hundred twenty-one thousand, one hundred two".