121271859960 has 128 divisors (see below), whose sum is σ = 366292454400. Its totient is φ = 32119718400.

The previous prime is 121271859931. The next prime is 121271859977. The reversal of 121271859960 is 69958172121.

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, 11380635 + ... + 11391285.

It is an arithmetic number, because the mean of its divisors is an integer number (2861659800).

Almost surely, 2^121271859960 is an apocalyptic number.

121271859960 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 121271859960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183146227200).

121271859960 is an abundant number, since it is smaller than the sum of its proper divisors (245020594440).

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

121271859960 is a wasteful number, since it uses less digits than its factorization.

121271859960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11301 (or 11297 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 121271859960 in words is "one hundred twenty-one billion, two hundred seventy-one million, eight hundred fifty-nine thousand, nine hundred sixty".