31322120111 has 2 divisors, whose sum is σ = 31322120112. Its totient is φ = 31322120110.

The previous prime is 31322120099. The next prime is 31322120129. The reversal of 31322120111 is 11102122313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31322120111 - 2¹⁸ = 31321857967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31322120111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31322320111) 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 as a sum of consecutive naturals, namely, 15661060055 + 15661060056.

It is an arithmetic number, because the mean of its divisors is an integer number (15661060056).

Almost surely, 2^31322120111 is an apocalyptic number.

31322120111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31322120111 is an equidigital number, since it uses as much as digits as its factorization.

31322120111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31322120111 its reverse (11102122313), we get a palindrome (42424242424).

The spelling of 31322120111 in words is "thirty-one billion, three hundred twenty-two million, one hundred twenty thousand, one hundred eleven".