13131212251 has 2 divisors, whose sum is σ = 13131212252. Its totient is φ = 13131212250.

The previous prime is 13131212249. The next prime is 13131212299. The reversal of 13131212251 is 15221213131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13131212251 - 2¹ = 13131212249 is a prime.

Together with 13131212249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13131212851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565606125 + 6565606126.

It is an arithmetic number, because the mean of its divisors is an integer number (6565606126).

Almost surely, 2^13131212251 is an apocalyptic number.

13131212251 is a deficient number, since it is larger than the sum of its proper divisors (1).

13131212251 is an equidigital number, since it uses as much as digits as its factorization.

13131212251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 22.

Adding to 13131212251 its reverse (15221213131), we get a palindrome (28352425382).

The spelling of 13131212251 in words is "thirteen billion, one hundred thirty-one million, two hundred twelve thousand, two hundred fifty-one".