31213212211241 has 2 divisors, whose sum is σ = 31213212211242. Its totient is φ = 31213212211240.

The previous prime is 31213212211219. The next prime is 31213212211249. The reversal of 31213212211241 is 14211221231213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30814267123600 + 398945087641 = 5551060^2 + 631621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31213212211241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31213212211241.

It is not a weakly prime, because it can be changed into another prime (31213212211249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606606105620 + 15606606105621.

It is an arithmetic number, because the mean of its divisors is an integer number (15606606105621).

Almost surely, 2^{31213212211241} is an apocalyptic number.

It is an amenable number.

31213212211241 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213212211241 is an equidigital number, since it uses as much as digits as its factorization.

31213212211241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

Adding to 31213212211241 its reverse (14211221231213), we get a palindrome (45424433442454).

The spelling of 31213212211241 in words is "thirty-one trillion, two hundred thirteen billion, two hundred twelve million, two hundred eleven thousand, two hundred forty-one".