25109321101 has 2 divisors, whose sum is σ = 25109321102. Its totient is φ = 25109321100.

The previous prime is 25109321077. The next prime is 25109321141. The reversal of 25109321101 is 10112390152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24048255625 + 1061065476 = 155075^2 + 32574^2 .

It is a cyclic number.

It is not a de Polignac number, because 25109321101 - 2³³ = 16519386509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25109321141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12554660550 + 12554660551.

It is an arithmetic number, because the mean of its divisors is an integer number (12554660551).

Almost surely, 2^25109321101 is an apocalyptic number.

It is an amenable number.

25109321101 is a deficient number, since it is larger than the sum of its proper divisors (1).

25109321101 is an equidigital number, since it uses as much as digits as its factorization.

25109321101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 25.

The spelling of 25109321101 in words is "twenty-five billion, one hundred nine million, three hundred twenty-one thousand, one hundred one".