121159990 has 32 divisors (see below), whose sum is σ = 249661440. Its totient is φ = 41470944.

The previous prime is 121159967. The next prime is 121159991. The reversal of 121159990 is 99951121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121159991) 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 15 ways as a sum of consecutive naturals, for example, 57699 + ... + 59761.

It is an arithmetic number, because the mean of its divisors is an integer number (7801920).

Almost surely, 2^121159990 is an apocalyptic number.

121159990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121159990 is an abundant number, since it is smaller than the sum of its proper divisors (128501450).

121159990 is a wasteful number, since it uses less digits than its factorization.

121159990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916.

The product of its (nonzero) digits is 7290, while the sum is 37.

The square root of 121159990 is about 11007.2698704084. The cubic root of 121159990 is about 494.8266440534.

The spelling of 121159990 in words is "one hundred twenty-one million, one hundred fifty-nine thousand, nine hundred ninety".