121112212100 has 72 divisors (see below), whose sum is σ = 291405890496. Its totient is φ = 43318800000.

The previous prime is 121112212099. The next prime is 121112212153. The reversal of 121112212100 is 1212211121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 835376 + ... + 969575.

Almost surely, 2^121112212100 is an apocalyptic number.

121112212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112212100 is an abundant number, since it is smaller than the sum of its proper divisors (170293678396).

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

121112212100 is a wasteful number, since it uses less digits than its factorization.

121112212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805037 (or 1805030 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121112212100 its reverse (1212211121), we get a palindrome (122324423221).

The spelling of 121112212100 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, one hundred".