31311122012011 has 8 divisors (see below), whose sum is σ = 32672560343040. Its totient is φ = 29949690781032.

The previous prime is 31311122011921. The next prime is 31311122012029. The reversal of 31311122012011 is 11021022111313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31311122012011 - 2³⁵ = 31276762273643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31311122012011.

It is not an unprimeable number, because it can be changed into a prime (31311122012311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8503030 + ... + 11615668.

It is an arithmetic number, because the mean of its divisors is an integer number (4084070042880).

Almost surely, 2^{31311122012011} is an apocalyptic number.

31311122012011 is a deficient number, since it is larger than the sum of its proper divisors (1361438331029).

31311122012011 is a wasteful number, since it uses less digits than its factorization.

31311122012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550025.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31311122012011 its reverse (11021022111313), we get a palindrome (42332144123324).

The spelling of 31311122012011 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-two million, twelve thousand, eleven".