31223143120399 has 2 divisors, whose sum is σ = 31223143120400. Its totient is φ = 31223143120398.

The previous prime is 31223143120229. The next prime is 31223143120439. The reversal of 31223143120399 is 99302134132213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31223143120399 - 2⁴¹ = 29024119864847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223143120199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611571560199 + 15611571560200.

It is an arithmetic number, because the mean of its divisors is an integer number (15611571560200).

Almost surely, 2^{31223143120399} is an apocalyptic number.

31223143120399 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223143120399 is an equidigital number, since it uses as much as digits as its factorization.

31223143120399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 43.

The spelling of 31223143120399 in words is "thirty-one trillion, two hundred twenty-three billion, one hundred forty-three million, one hundred twenty thousand, three hundred ninety-nine".