121374481536 has 512 divisors, whose sum is σ = 461054361600. Its totient is φ = 30506803200.

The previous prime is 121374481513. The next prime is 121374481537. The reversal of 121374481536 is 635184473121.

121374481536 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 74 + 48 + 1 + 536 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 121374481491 and 121374481500.

It is not an unprimeable number, because it can be changed into a prime (121374481537) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8242116 + ... + 8256828.

It is an arithmetic number, because the mean of its divisors is an integer number (900496800).

Almost surely, 2^121374481536 is an apocalyptic number.

121374481536 is a gapful number since it is divisible by the number (16) 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 121374481536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230527180800).

121374481536 is an abundant number, since it is smaller than the sum of its proper divisors (339679880064).

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

121374481536 is a wasteful number, since it uses less digits than its factorization.

121374481536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14785 (or 14767 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 121374481536 in words is "one hundred twenty-one billion, three hundred seventy-four million, four hundred eighty-one thousand, five hundred thirty-six".