121560612192 has 96 divisors (see below), whose sum is σ = 366777784800. Its totient is φ = 39122947584.

The previous prime is 121560612191. The next prime is 121560612209. The reversal of 121560612192 is 291216065121.

121560612192 is a `hidden beast` number, since 1 + 2 + 1 + 560 + 6 + 1 + 2 + 1 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121560612191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2400723 + ... + 2450834.

It is an arithmetic number, because the mean of its divisors is an integer number (3820601925).

Almost surely, 2^121560612192 is an apocalyptic number.

121560612192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121560612192 is an abundant number, since it is smaller than the sum of its proper divisors (245217172608).

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

121560612192 is a wasteful number, since it uses less digits than its factorization.

121560612192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4851605 (or 4851591 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 121560612192 in words is "one hundred twenty-one billion, five hundred sixty million, six hundred twelve thousand, one hundred ninety-two".