121112121100 has 36 divisors (see below), whose sum is σ = 262872064000. Its totient is φ = 48434016960.

The previous prime is 121112121049. The next prime is 121112121139. The reversal of 121112121100 is 1121211121.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 321781 + ... + 588019.

Almost surely, 2^121112121100 is an apocalyptic number.

121112121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112121100 is an abundant number, since it is smaller than the sum of its proper divisors (141759942900).

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

121112121100 is a wasteful number, since it uses less digits than its factorization.

121112121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270802 (or 270795 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121112121100 its reverse (1121211121), we get a palindrome (122233332221).

The spelling of 121112121100 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred".