121061988 has 36 divisors (see below), whose sum is σ = 308439040. Its totient is φ = 40034736.

The previous prime is 121061987. The next prime is 121062043. The reversal of 121061988 is 889160121.

It is a tau number, because it is divible by the number of its divisors (36).

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 (121061987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8668 + ... + 17811.

Almost surely, 2^121061988 is an apocalyptic number.

121061988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121061988 is an abundant number, since it is smaller than the sum of its proper divisors (187377052).

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

121061988 is a wasteful number, since it uses less digits than its factorization.

121061988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26616 (or 26611 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 121061988 is about 11002.8172755890. The cubic root of 121061988 is about 494.6931921835.

The spelling of 121061988 in words is "one hundred twenty-one million, sixty-one thousand, nine hundred eighty-eight".