21223120200312 has 32 divisors (see below), whose sum is σ = 53249344923600. Its totient is φ = 7048834143744.

The previous prime is 21223120200281. The next prime is 21223120200383. The reversal of 21223120200312 is 21300202132212.

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, 1596196737 + ... + 1596210032.

Almost surely, 2^{21223120200312} is an apocalyptic number.

It is an amenable number.

21223120200312 is an abundant number, since it is smaller than the sum of its proper divisors (32026224723288).

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

21223120200312 is a wasteful number, since it uses less digits than its factorization.

21223120200312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192407055 (or 3192407051 counting only the distinct ones).

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

Adding to 21223120200312 its reverse (21300202132212), we get a palindrome (42523322332524).

The spelling of 21223120200312 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred twenty million, two hundred thousand, three hundred twelve".