121953660 has 24 divisors (see below), whose sum is σ = 341470416. Its totient is φ = 32520960.

The previous prime is 121953653. The next prime is 121953679. The reversal of 121953660 is 66359121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016221 + ... + 1016340.

It is an arithmetic number, because the mean of its divisors is an integer number (14227934).

Almost surely, 2^121953660 is an apocalyptic number.

121953660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121953660 is an abundant number, since it is smaller than the sum of its proper divisors (219516756).

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

121953660 is a wasteful number, since it uses less digits than its factorization.

121953660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032573 (or 2032571 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 121953660 is about 11043.2631047168. The cubic root of 121953660 is about 495.9047629755.

The spelling of 121953660 in words is "one hundred twenty-one million, nine hundred fifty-three thousand, six hundred sixty".