21102021102 has 32 divisors (see below), whose sum is σ = 42638328864. Its totient is φ = 6961680000.

The previous prime is 21102021097. The next prime is 21102021119. The reversal of 21102021102 is 20112020112.

21102021102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2126352 + ... + 2136252.

It is an arithmetic number, because the mean of its divisors is an integer number (1332447777).

Almost surely, 2^21102021102 is an apocalyptic number.

21102021102 is an abundant number, since it is smaller than the sum of its proper divisors (21536307762).

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

21102021102 is a wasteful number, since it uses less digits than its factorization.

21102021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13524.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21102021102 its reverse (20112020112), we get a palindrome (41214041214).

The spelling of 21102021102 in words is "twenty-one billion, one hundred two million, twenty-one thousand, one hundred two".