121631160 has 128 divisors (see below), whose sum is σ = 439027200. Its totient is φ = 26334720.

The previous prime is 121631137. The next prime is 121631171. The reversal of 121631160 is 61136121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12150 + ... + 19770.

It is an arithmetic number, because the mean of its divisors is an integer number (3429900).

Almost surely, 2^121631160 is an apocalyptic number.

121631160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121631160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219513600).

121631160 is an abundant number, since it is smaller than the sum of its proper divisors (317396040).

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

121631160 is a wasteful number, since it uses less digits than its factorization.

121631160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7661 (or 7657 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 121631160 is about 11028.6517761692. The cubic root of 121631160 is about 495.4672457842.

Adding to 121631160 its reverse (61136121), we get a palindrome (182767281).

The spelling of 121631160 in words is "one hundred twenty-one million, six hundred thirty-one thousand, one hundred sixty".