213131231107 has 2 divisors, whose sum is σ = 213131231108. Its totient is φ = 213131231106.

The previous prime is 213131231083. The next prime is 213131231111. The reversal of 213131231107 is 701132131312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213131231107 - 2¹⁵ = 213131198339 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (213131231167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565615553 + 106565615554.

It is an arithmetic number, because the mean of its divisors is an integer number (106565615554).

Almost surely, 2^213131231107 is an apocalyptic number.

213131231107 is a deficient number, since it is larger than the sum of its proper divisors (1).

213131231107 is an equidigital number, since it uses as much as digits as its factorization.

213131231107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

Adding to 213131231107 its reverse (701132131312), we get a palindrome (914263362419).

The spelling of 213131231107 in words is "two hundred thirteen billion, one hundred thirty-one million, two hundred thirty-one thousand, one hundred seven".