21312212223000 has 64 divisors (see below), whose sum is σ = 66494102145120. Its totient is φ = 5683256592000.

The previous prime is 21312212222999. The next prime is 21312212223023. The reversal of 21312212223000 is 32221221312.

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, 3552032371 + ... + 3552038370.

Almost surely, 2^{21312212223000} is an apocalyptic number.

21312212223000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21312212223000 is an abundant number, since it is smaller than the sum of its proper divisors (45181889922120).

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

21312212223000 is a wasteful number, since it uses less digits than its factorization.

21312212223000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7104070765 (or 7104070751 counting only the distinct ones).

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

Adding to 21312212223000 its reverse (32221221312), we get a palindrome (21344433444312).

The spelling of 21312212223000 in words is "twenty-one trillion, three hundred twelve billion, two hundred twelve million, two hundred twenty-three thousand".