121373507925 has 36 divisors (see below), whose sum is σ = 217412172900. Its totient is φ = 64726959360.

The previous prime is 121373507903. The next prime is 121373507929. The reversal of 121373507925 is 529705373121.

121373507925 is a `hidden beast` number, since 1 + 2 + 137 + 3 + 507 + 9 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 6000516369 + 115372991556 = 77463^2 + 339666^2 .

It is not a de Polignac number, because 121373507925 - 2⁹ = 121373507413 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121373507929) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5016457 + ... + 5040593.

It is an arithmetic number, because the mean of its divisors is an integer number (6039227025).

Almost surely, 2^121373507925 is an apocalyptic number.

121373507925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121373507925 is a deficient number, since it is larger than the sum of its proper divisors (96038664975).

121373507925 is a wasteful number, since it uses less digits than its factorization.

121373507925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46502 (or 46494 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 45.

The spelling of 121373507925 in words is "one hundred twenty-one billion, three hundred seventy-three million, five hundred seven thousand, nine hundred twenty-five".