31223102111 has 2 divisors, whose sum is σ = 31223102112. Its totient is φ = 31223102110.

The previous prime is 31223102101. The next prime is 31223102137. The reversal of 31223102111 is 11120132213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31223102111 - 2⁶ = 31223102047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31223102111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223102101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611551055 + 15611551056.

It is an arithmetic number, because the mean of its divisors is an integer number (15611551056).

Almost surely, 2^31223102111 is an apocalyptic number.

31223102111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223102111 is an equidigital number, since it uses as much as digits as its factorization.

31223102111 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 31223102111 its reverse (11120132213), we get a palindrome (42343234324).

The spelling of 31223102111 in words is "thirty-one billion, two hundred twenty-three million, one hundred two thousand, one hundred eleven".