31221304143019 has 2 divisors, whose sum is σ = 31221304143020. Its totient is φ = 31221304143018.

The previous prime is 31221304143011. The next prime is 31221304143047. The reversal of 31221304143019 is 91034140312213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31221304143019 - 2³ = 31221304143011 is a prime.

It is a super-2 number, since 2×31221304143019² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31221304143011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15610652071509 + 15610652071510.

It is an arithmetic number, because the mean of its divisors is an integer number (15610652071510).

Almost surely, 2^{31221304143019} is an apocalyptic number.

31221304143019 is a deficient number, since it is larger than the sum of its proper divisors (1).

31221304143019 is an equidigital number, since it uses as much as digits as its factorization.

31221304143019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 31221304143019 in words is "thirty-one trillion, two hundred twenty-one billion, three hundred four million, one hundred forty-three thousand, nineteen".