12539253101 has 4 divisors (see below), whose sum is σ = 12540406812. Its totient is φ = 12538099392.

The previous prime is 12539253043. The next prime is 12539253109. The reversal of 12539253101 is 10135293521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3086358025 + 9452895076 = 55555^2 + 97226^2 .

It is a cyclic number.

It is not a de Polignac number, because 12539253101 - 2⁶ = 12539253037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12539253109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560396 + ... + 582341.

It is an arithmetic number, because the mean of its divisors is an integer number (3135101703).

Almost surely, 2^12539253101 is an apocalyptic number.

It is an amenable number.

12539253101 is a deficient number, since it is larger than the sum of its proper divisors (1153711).

12539253101 is a wasteful number, since it uses less digits than its factorization.

12539253101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153710.

The product of its (nonzero) digits is 8100, while the sum is 32.

The spelling of 12539253101 in words is "twelve billion, five hundred thirty-nine million, two hundred fifty-three thousand, one hundred one".