121825985715 has 224 divisors, whose sum is σ = 267104716800. Its totient is φ = 52076494080.

The previous prime is 121825985707. The next prime is 121825985719. The reversal of 121825985715 is 517589528121.

121825985715 is a `hidden beast` number, since 1 + 2 + 18 + 2 + 59 + 8 + 571 + 5 = 666.

It is not a de Polignac number, because 121825985715 - 2³ = 121825985707 is a prime.

It is a super-2 number, since 2×121825985715² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (121825985719) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 38296425 + ... + 38299605.

Almost surely, 2^121825985715 is an apocalyptic number.

121825985715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121825985715 is an abundant number, since it is smaller than the sum of its proper divisors (145278731085).

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

121825985715 is an equidigital number, since it uses as much as digits as its factorization.

121825985715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309 (or 3294 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 54.

The spelling of 121825985715 in words is "one hundred twenty-one billion, eight hundred twenty-five million, nine hundred eighty-five thousand, seven hundred fifteen".