231301213131211 has 2 divisors, whose sum is σ = 231301213131212. Its totient is φ = 231301213131210.

The previous prime is 231301213131187. The next prime is 231301213131229. The reversal of 231301213131211 is 112131312103132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231301213131211 - 2³⁵ = 231266853392843 is a prime.

It is not a weakly prime, because it can be changed into another prime (231301213141211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115650606565605 + 115650606565606.

It is an arithmetic number, because the mean of its divisors is an integer number (115650606565606).

Almost surely, 2^{231301213131211} is an apocalyptic number.

231301213131211 is a deficient number, since it is larger than the sum of its proper divisors (1).

231301213131211 is an equidigital number, since it uses as much as digits as its factorization.

231301213131211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 231301213131211 its reverse (112131312103132), we get a palindrome (343432525234343).

The spelling of 231301213131211 in words is "two hundred thirty-one trillion, three hundred one billion, two hundred thirteen million, one hundred thirty-one thousand, two hundred eleven".