25087938121 has 2 divisors, whose sum is σ = 25087938122. Its totient is φ = 25087938120.

The previous prime is 25087938101. The next prime is 25087938157. The reversal of 25087938121 is 12183978052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18073038096 + 7014900025 = 134436^2 + 83755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25087938121 is a prime.

It is not a weakly prime, because it can be changed into another prime (25087938101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12543969060 + 12543969061.

It is an arithmetic number, because the mean of its divisors is an integer number (12543969061).

Almost surely, 2^25087938121 is an apocalyptic number.

It is an amenable number.

25087938121 is a deficient number, since it is larger than the sum of its proper divisors (1).

25087938121 is an equidigital number, since it uses as much as digits as its factorization.

25087938121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 25087938121 in words is "twenty-five billion, eighty-seven million, nine hundred thirty-eight thousand, one hundred twenty-one".