121373978 has 16 divisors (see below), whose sum is σ = 200373696. Its totient is φ = 54680640.

The previous prime is 121373977. The next prime is 121373983. The reversal of 121373978 is 879373121.

It is not an unprimeable number, because it can be changed into a prime (121373977) 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, 21926 + ... + 26897.

It is an arithmetic number, because the mean of its divisors is an integer number (12523356).

Almost surely, 2^121373978 is an apocalyptic number.

121373978 is a deficient number, since it is larger than the sum of its proper divisors (78999718).

121373978 is a wasteful number, since it uses less digits than its factorization.

121373978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48949.

The product of its digits is 63504, while the sum is 41.

The square root of 121373978 is about 11016.9858854407. The cubic root of 121373978 is about 495.1177871588.

The spelling of 121373978 in words is "one hundred twenty-one million, three hundred seventy-three thousand, nine hundred seventy-eight".