31102001311 has 2 divisors, whose sum is σ = 31102001312. Its totient is φ = 31102001310.

The previous prime is 31102001309. The next prime is 31102001353. The reversal of 31102001311 is 11310020113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31102001311 - 2¹ = 31102001309 is a prime.

Together with 31102001309, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 31102001291 and 31102001300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31102002311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551000655 + 15551000656.

It is an arithmetic number, because the mean of its divisors is an integer number (15551000656).

Almost surely, 2^31102001311 is an apocalyptic number.

31102001311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31102001311 is an equidigital number, since it uses as much as digits as its factorization.

31102001311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31102001311 its reverse (11310020113), we get a palindrome (42412021424).

The spelling of 31102001311 in words is "thirty-one billion, one hundred two million, one thousand, three hundred eleven".