121936940 has 24 divisors (see below), whose sum is σ = 256338432. Its totient is φ = 48723200.

The previous prime is 121936939. The next prime is 121936943. The reversal of 121936940 is 49639121.

It is a self number, because there is not a number n which added to its sum of digits gives 121936940.

It is not an unprimeable number, because it can be changed into a prime (121936943) 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, 20372 + ... + 25668.

It is an arithmetic number, because the mean of its divisors is an integer number (10680768).

Almost surely, 2^121936940 is an apocalyptic number.

121936940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121936940 is an abundant number, since it is smaller than the sum of its proper divisors (134401492).

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

121936940 is a wasteful number, since it uses less digits than its factorization.

121936940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6457 (or 6455 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 121936940 is about 11042.5060561450. The cubic root of 121936940 is about 495.8820988844.

The spelling of 121936940 in words is "one hundred twenty-one million, nine hundred thirty-six thousand, nine hundred forty".