221021112120012 has 96 divisors (see below), whose sum is σ = 574771237510400. Its totient is φ = 73448266320000.

The previous prime is 221021112119971. The next prime is 221021112120023. The reversal of 221021112120012 is 210021211120122.

221021112120012 is a `hidden beast` number, since 221 + 0 + 211 + 1 + 21 + 200 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1045559064 + ... + 1045770432.

Almost surely, 2^{221021112120012} is an apocalyptic number.

It is an amenable number.

221021112120012 is an abundant number, since it is smaller than the sum of its proper divisors (353750125390388).

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

221021112120012 is a wasteful number, since it uses less digits than its factorization.

221021112120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240964 (or 240956 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221021112120012 its reverse (210021211120122), we get a palindrome (431042323240134).

The spelling of 221021112120012 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twelve million, one hundred twenty thousand, twelve".