21002020112212 has 24 divisors (see below), whose sum is σ = 37271571966720. Its totient is φ = 10353002577120.

The previous prime is 21002020112189. The next prime is 21002020112251. The reversal of 21002020112212 is 21221102020012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32427093 + ... + 33068419.

It is an arithmetic number, because the mean of its divisors is an integer number (1552982165280).

Almost surely, 2^{21002020112212} is an apocalyptic number.

It is an amenable number.

21002020112212 is a deficient number, since it is larger than the sum of its proper divisors (16269551854508).

21002020112212 is a wasteful number, since it uses less digits than its factorization.

21002020112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756711 (or 756709 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21002020112212 its reverse (21221102020012), we get a palindrome (42223122132224).

The spelling of 21002020112212 in words is "twenty-one trillion, two billion, twenty million, one hundred twelve thousand, two hundred twelve".