121661160 has 32 divisors (see below), whose sum is σ = 364983840. Its totient is φ = 32442944.

The previous prime is 121661117. The next prime is 121661167. The reversal of 121661160 is 61166121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 121661160.

It is not an unprimeable number, because it can be changed into a prime (121661167) 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, 506802 + ... + 507041.

It is an arithmetic number, because the mean of its divisors is an integer number (11405745).

Almost surely, 2^121661160 is an apocalyptic number.

121661160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121661160 is an abundant number, since it is smaller than the sum of its proper divisors (243322680).

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

121661160 is a wasteful number, since it uses less digits than its factorization.

121661160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013857 (or 1013853 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 121661160 is about 11030.0117860318. The cubic root of 121661160 is about 495.5079776589.

The spelling of 121661160 in words is "one hundred twenty-one million, six hundred sixty-one thousand, one hundred sixty".