121489635960 has 384 divisors, whose sum is σ = 492774796800. Its totient is φ = 25218708480.

The previous prime is 121489635959. The next prime is 121489635991. The reversal of 121489635960 is 69536984121.

121489635960 is a `hidden beast` number, since 1 + 2 + 1 + 48 + 9 + 6 + 3 + 596 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 121489635897 and 121489635906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 39610347 + ... + 39613413.

It is an arithmetic number, because the mean of its divisors is an integer number (1283267700).

Almost surely, 2^121489635960 is an apocalyptic number.

121489635960 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 121489635960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246387398400).

121489635960 is an abundant number, since it is smaller than the sum of its proper divisors (371285160840).

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

121489635960 is a wasteful number, since it uses less digits than its factorization.

121489635960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4531 (or 4524 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 121489635960 in words is "one hundred twenty-one billion, four hundred eighty-nine million, six hundred thirty-five thousand, nine hundred sixty".