31112202222989 has 2 divisors, whose sum is σ = 31112202222990. Its totient is φ = 31112202222988.

The previous prime is 31112202222979. The next prime is 31112202223033. The reversal of 31112202222989 is 98922220221113.

It is a happy number.

It is an a-pointer prime, because the next prime (31112202223033) can be obtained adding 31112202222989 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30823260496900 + 288941726089 = 5551870^2 + 537533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31112202222989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31112202222979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556101111494 + 15556101111495.

It is an arithmetic number, because the mean of its divisors is an integer number (15556101111495).

Almost surely, 2^{31112202222989} is an apocalyptic number.

It is an amenable number.

31112202222989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112202222989 is an equidigital number, since it uses as much as digits as its factorization.

31112202222989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 31112202222989 in words is "thirty-one trillion, one hundred twelve billion, two hundred two million, two hundred twenty-two thousand, nine hundred eighty-nine".