31321310111011 has 2 divisors, whose sum is σ = 31321310111012. Its totient is φ = 31321310111010.

The previous prime is 31321310110973. The next prime is 31321310111033. The reversal of 31321310111011 is 11011101312313.

It is a strong prime.

It is an emirp because it is prime and its reverse (11011101312313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31321310111011 is a prime.

It is a super-2 number, since 2×31321310111011² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31321310111011.

It is not a weakly prime, because it can be changed into another prime (31321310111051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660655055505 + 15660655055506.

It is an arithmetic number, because the mean of its divisors is an integer number (15660655055506).

Almost surely, 2^{31321310111011} is an apocalyptic number.

31321310111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321310111011 is an equidigital number, since it uses as much as digits as its factorization.

31321310111011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 31321310111011 its reverse (11011101312313), we get a palindrome (42332411423324).

The spelling of 31321310111011 in words is "thirty-one trillion, three hundred twenty-one billion, three hundred ten million, one hundred eleven thousand, eleven".