31344211121 has 2 divisors, whose sum is σ = 31344211122. Its totient is φ = 31344211120.

The previous prime is 31344211079. The next prime is 31344211133. The reversal of 31344211121 is 12111244313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27929094400 + 3415116721 = 167120^2 + 58439^2 .

It is a cyclic number.

It is not a de Polignac number, because 31344211121 - 2³⁴ = 14164341937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31344211141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672105560 + 15672105561.

It is an arithmetic number, because the mean of its divisors is an integer number (15672105561).

Almost surely, 2^31344211121 is an apocalyptic number.

It is an amenable number.

31344211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31344211121 is an equidigital number, since it uses as much as digits as its factorization.

31344211121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

Adding to 31344211121 its reverse (12111244313), we get a palindrome (43455455434).

The spelling of 31344211121 in words is "thirty-one billion, three hundred forty-four million, two hundred eleven thousand, one hundred twenty-one".