31311132222011 has 16 divisors (see below), whose sum is σ = 31439787452640. Its totient is φ = 31182797560320.

The previous prime is 31311132221989. The next prime is 31311132222017. The reversal of 31311132222011 is 11022223111313.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31311132222011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311132222017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596046995 + ... + 596099523.

It is an arithmetic number, because the mean of its divisors is an integer number (1964986715790).

Almost surely, 2^{31311132222011} is an apocalyptic number.

31311132222011 is a deficient number, since it is larger than the sum of its proper divisors (128655230629).

31311132222011 is a wasteful number, since it uses less digits than its factorization.

31311132222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55534.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31311132222011 its reverse (11022223111313), we get a palindrome (42333355333324).

The spelling of 31311132222011 in words is "thirty-one trillion, three hundred eleven billion, one hundred thirty-two million, two hundred twenty-two thousand, eleven".