31222202989 has 2 divisors, whose sum is σ = 31222202990. Its totient is φ = 31222202988.

The previous prime is 31222202987. The next prime is 31222203031. The reversal of 31222202989 is 98920222213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23114641225 + 8107561764 = 152035^2 + 90042^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222202989 - 2¹ = 31222202987 is a prime.

Together with 31222202987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31222202987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611101494 + 15611101495.

It is an arithmetic number, because the mean of its divisors is an integer number (15611101495).

Almost surely, 2^31222202989 is an apocalyptic number.

It is an amenable number.

31222202989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222202989 is an equidigital number, since it uses as much as digits as its factorization.

31222202989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 31222202989 in words is "thirty-one billion, two hundred twenty-two million, two hundred two thousand, nine hundred eighty-nine".