31201133321311 has 2 divisors, whose sum is σ = 31201133321312. Its totient is φ = 31201133321310.

The previous prime is 31201133321233. The next prime is 31201133321329. The reversal of 31201133321311 is 11312333110213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31201133321311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31201133321341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600566660655 + 15600566660656.

It is an arithmetic number, because the mean of its divisors is an integer number (15600566660656).

Almost surely, 2^{31201133321311} is an apocalyptic number.

31201133321311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201133321311 is an equidigital number, since it uses as much as digits as its factorization.

31201133321311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31201133321311 its reverse (11312333110213), we get a palindrome (42513466431524).

The spelling of 31201133321311 in words is "thirty-one trillion, two hundred one billion, one hundred thirty-three million, three hundred twenty-one thousand, three hundred eleven".