20104525121 has 2 divisors, whose sum is σ = 20104525122. Its totient is φ = 20104525120.

The previous prime is 20104525109. The next prime is 20104525153. The reversal of 20104525121 is 12152540102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17171219521 + 2933305600 = 131039^2 + 54160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20104525121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20104525321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052262560 + 10052262561.

It is an arithmetic number, because the mean of its divisors is an integer number (10052262561).

Almost surely, 2^20104525121 is an apocalyptic number.

It is an amenable number.

20104525121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104525121 is an equidigital number, since it uses as much as digits as its factorization.

20104525121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 20104525121 in words is "twenty billion, one hundred four million, five hundred twenty-five thousand, one hundred twenty-one".