202120421312 has 28 divisors (see below), whose sum is σ = 409616391840. Its totient is φ = 98909991936.

The previous prime is 202120421303. The next prime is 202120421341. The reversal of 202120421312 is 213124021202.

It is a super-2 number, since 2×202120421312² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33594137 + ... + 33600152.

Almost surely, 2^202120421312 is an apocalyptic number.

It is an amenable number.

202120421312 is an abundant number, since it is smaller than the sum of its proper divisors (207495970528).

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

202120421312 is an equidigital number, since it uses as much as digits as its factorization.

202120421312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67194348 (or 67194338 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 202120421312 its reverse (213124021202), we get a palindrome (415244442514).

The spelling of 202120421312 in words is "two hundred two billion, one hundred twenty million, four hundred twenty-one thousand, three hundred twelve".