13131122987 has 2 divisors, whose sum is σ = 13131122988. Its totient is φ = 13131122986.

The previous prime is 13131122957. The next prime is 13131123001. The reversal of 13131122987 is 78922113131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13131122987 - 2⁸ = 13131122731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13131122987.

It is not a weakly prime, because it can be changed into another prime (13131122957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565561493 + 6565561494.

It is an arithmetic number, because the mean of its divisors is an integer number (6565561494).

Almost surely, 2^13131122987 is an apocalyptic number.

13131122987 is a deficient number, since it is larger than the sum of its proper divisors (1).

13131122987 is an equidigital number, since it uses as much as digits as its factorization.

13131122987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The spelling of 13131122987 in words is "thirteen billion, one hundred thirty-one million, one hundred twenty-two thousand, nine hundred eighty-seven".