121520225185600 has 84 divisors (see below), whose sum is σ = 299063980185804. Its totient is φ = 48600242298880.

The previous prime is 121520225185561. The next prime is 121520225185607. The reversal of 121520225185600 is 6581522025121.

It can be written as a sum of positive squares in 6 ways, for example, as 7056588467776 + 114463636717824 = 2656424^2 + 10698768^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121520225185607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3787224 + ... + 16043176.

Almost surely, 2^{121520225185600} is an apocalyptic number.

121520225185600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121520225185600 is an abundant number, since it is smaller than the sum of its proper divisors (177543755000204).

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

121520225185600 is a wasteful number, since it uses less digits than its factorization.

121520225185600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12262172 (or 12262157 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 40.

The spelling of 121520225185600 in words is "one hundred twenty-one trillion, five hundred twenty billion, two hundred twenty-five million, one hundred eighty-five thousand, six hundred".