121541616432 has 60 divisors (see below), whose sum is σ = 340615890160. Its totient is φ = 40458109824.

The previous prime is 121541616431. The next prime is 121541616451. The reversal of 121541616432 is 234616145121.

121541616432 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 4 + 1 + 6 + 1 + 643 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121541616431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475807 + ... + 685182.

Almost surely, 2^121541616432 is an apocalyptic number.

121541616432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121541616432 is an abundant number, since it is smaller than the sum of its proper divisors (219074273728).

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

121541616432 is a wasteful number, since it uses less digits than its factorization.

121541616432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161730 (or 1161721 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 121541616432 in words is "one hundred twenty-one billion, five hundred forty-one million, six hundred sixteen thousand, four hundred thirty-two".