31222001149 has 2 divisors, whose sum is σ = 31222001150. Its totient is φ = 31222001148.

The previous prime is 31222001147. The next prime is 31222001179. The reversal of 31222001149 is 94110022213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28770265924 + 2451735225 = 169618^2 + 49515^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222001149 - 2¹ = 31222001147 is a prime.

Together with 31222001147, 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 (31222001147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611000574 + 15611000575.

It is an arithmetic number, because the mean of its divisors is an integer number (15611000575).

Almost surely, 2^31222001149 is an apocalyptic number.

It is an amenable number.

31222001149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222001149 is an equidigital number, since it uses as much as digits as its factorization.

31222001149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 31222001149 in words is "thirty-one billion, two hundred twenty-two million, one thousand, one hundred forty-nine".