25210505101 has 2 divisors, whose sum is σ = 25210505102. Its totient is φ = 25210505100.

The previous prime is 25210505087. The next prime is 25210505141. The reversal of 25210505101 is 10150501252.

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., 16186455076 + 9024050025 = 127226^2 + 94995^2 .

It is a cyclic number.

It is not a de Polignac number, because 25210505101 - 2⁹ = 25210504589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25210505141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12605252550 + 12605252551.

It is an arithmetic number, because the mean of its divisors is an integer number (12605252551).

Almost surely, 2^25210505101 is an apocalyptic number.

It is an amenable number.

25210505101 is a deficient number, since it is larger than the sum of its proper divisors (1).

25210505101 is an equidigital number, since it uses as much as digits as its factorization.

25210505101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 500, while the sum is 22.

The spelling of 25210505101 in words is "twenty-five billion, two hundred ten million, five hundred five thousand, one hundred one".