21000220102110 has 32 divisors (see below), whose sum is σ = 53365265201952. Its totient is φ = 5270643476480.

The previous prime is 21000220102079. The next prime is 21000220102163. The reversal of 21000220102110 is 1120102200012.

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, 20588450571 + ... + 20588451590.

It is an arithmetic number, because the mean of its divisors is an integer number (1667664537561).

Almost surely, 2^{21000220102110} is an apocalyptic number.

21000220102110 is an abundant number, since it is smaller than the sum of its proper divisors (32365045099842).

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

21000220102110 is a wasteful number, since it uses less digits than its factorization.

21000220102110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41176902188.

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

Adding to 21000220102110 its reverse (1120102200012), we get a palindrome (22120322302122).

The spelling of 21000220102110 in words is "twenty-one trillion, two hundred twenty million, one hundred two thousand, one hundred ten".