211312310137 has 2 divisors, whose sum is σ = 211312310138. Its totient is φ = 211312310136.

The previous prime is 211312310063. The next prime is 211312310177. The reversal of 211312310137 is 731013213112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132247868281 + 79064441856 = 363659^2 + 281184^2 .

It is a cyclic number.

It is not a de Polignac number, because 211312310137 - 2⁷ = 211312310009 is a prime.

It is not a weakly prime, because it can be changed into another prime (211312310177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105656155068 + 105656155069.

It is an arithmetic number, because the mean of its divisors is an integer number (105656155069).

Almost surely, 2^211312310137 is an apocalyptic number.

It is an amenable number.

211312310137 is a deficient number, since it is larger than the sum of its proper divisors (1).

211312310137 is an equidigital number, since it uses as much as digits as its factorization.

211312310137 is an evil number, because the sum of its binary digits is even.

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

Adding to 211312310137 its reverse (731013213112), we get a palindrome (942325523249).

The spelling of 211312310137 in words is "two hundred eleven billion, three hundred twelve million, three hundred ten thousand, one hundred thirty-seven".