31123222019 has 2 divisors, whose sum is σ = 31123222020. Its totient is φ = 31123222018.

The previous prime is 31123221989. The next prime is 31123222027. The reversal of 31123222019 is 91022232113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31123222019 is a prime.

It is a super-2 number, since 2×31123222019² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31123222049) 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, 15561611009 + 15561611010.

It is an arithmetic number, because the mean of its divisors is an integer number (15561611010).

Almost surely, 2^31123222019 is an apocalyptic number.

31123222019 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123222019 is an equidigital number, since it uses as much as digits as its factorization.

31123222019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 31123222019 in words is "thirty-one billion, one hundred twenty-three million, two hundred twenty-two thousand, nineteen".