121212110988 has 24 divisors (see below), whose sum is σ = 314253621360. Its totient is φ = 40404036960.

The previous prime is 121212110977. The next prime is 121212110989. The reversal of 121212110988 is 889011212121.

It is a happy number.

It is a super-2 number, since 2×121212110988² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121212110989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561167073 + ... + 561167288.

It is an arithmetic number, because the mean of its divisors is an integer number (13093900890).

Almost surely, 2^121212110988 is an apocalyptic number.

121212110988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121212110988 is an abundant number, since it is smaller than the sum of its proper divisors (193041510372).

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

121212110988 is a wasteful number, since it uses less digits than its factorization.

121212110988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122334374 (or 1122334366 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The spelling of 121212110988 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, nine hundred eighty-eight".