121112212000 has 96 divisors (see below), whose sum is σ = 320463050544. Its totient is φ = 44718336000.

The previous prime is 121112211973. The next prime is 121112212021. The reversal of 121112212000 is 212211121.

It can be written as a sum of positive squares in 8 ways, for example, as 7788415504 + 113323796496 = 88252^2 + 336636^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

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, 1112541 + ... + 1216540.

Almost surely, 2^121112212000 is an apocalyptic number.

121112212000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112212000 is an abundant number, since it is smaller than the sum of its proper divisors (199350838544).

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

121112212000 is a wasteful number, since it uses less digits than its factorization.

121112212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329119 (or 2329101 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121112212000 its reverse (212211121), we get a palindrome (121324423121).

The spelling of 121112212000 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand".