121130790978 has 16 divisors (see below), whose sum is σ = 242266056480. Its totient is φ = 40376184576.

The previous prime is 121130790961. The next prime is 121130791003. The reversal of 121130790978 is 879097031121.

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 7 ways as a sum of consecutive naturals, for example, 240801 + ... + 547947.

It is an arithmetic number, because the mean of its divisors is an integer number (15141628530).

Almost surely, 2^121130790978 is an apocalyptic number.

121130790978 is an abundant number, since it is smaller than the sum of its proper divisors (121135265502).

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

121130790978 is a wasteful number, since it uses less digits than its factorization.

121130790978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372881.

The product of its (nonzero) digits is 190512, while the sum is 48.

The spelling of 121130790978 in words is "one hundred twenty-one billion, one hundred thirty million, seven hundred ninety thousand, nine hundred seventy-eight".