31312213321241 has 2 divisors, whose sum is σ = 31312213321242. Its totient is φ = 31312213321240.

The previous prime is 31312213321223. The next prime is 31312213321247. The reversal of 31312213321241 is 14212331221313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31290374688400 + 21838632841 = 5593780^2 + 147779^2 .

It is an emirp because it is prime and its reverse (14212331221313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31312213321241 - 2⁶ = 31312213321177 is a prime.

It is not a weakly prime, because it can be changed into another prime (31312213321247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656106660620 + 15656106660621.

It is an arithmetic number, because the mean of its divisors is an integer number (15656106660621).

Almost surely, 2^{31312213321241} is an apocalyptic number.

It is an amenable number.

31312213321241 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312213321241 is an equidigital number, since it uses as much as digits as its factorization.

31312213321241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

Adding to 31312213321241 its reverse (14212331221313), we get a palindrome (45524544542554).

The spelling of 31312213321241 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirteen million, three hundred twenty-one thousand, two hundred forty-one".