31241211311 has 2 divisors, whose sum is σ = 31241211312. Its totient is φ = 31241211310.

The previous prime is 31241211307. The next prime is 31241211329. The reversal of 31241211311 is 11311214213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31241211311 - 2² = 31241211307 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31241211511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620605655 + 15620605656.

It is an arithmetic number, because the mean of its divisors is an integer number (15620605656).

Almost surely, 2^31241211311 is an apocalyptic number.

31241211311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31241211311 is an equidigital number, since it uses as much as digits as its factorization.

31241211311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 20.

Adding to 31241211311 its reverse (11311214213), we get a palindrome (42552425524).

The spelling of 31241211311 in words is "thirty-one billion, two hundred forty-one million, two hundred eleven thousand, three hundred eleven".