31202420213 has 2 divisors, whose sum is σ = 31202420214. Its totient is φ = 31202420212.

The previous prime is 31202420201. The next prime is 31202420261.

31202420213 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30950309329 + 252110884 = 175927^2 + 15878^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 31202420213 - 2³⁴ = 14022551029 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31202620213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15601210106 + 15601210107.

It is an arithmetic number, because the mean of its divisors is an integer number (15601210107).

Almost surely, 2^31202420213 is an apocalyptic number.

It is an amenable number.

31202420213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31202420213 is an equidigital number, since it uses as much as digits as its factorization.

31202420213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The spelling of 31202420213 in words is "thirty-one billion, two hundred two million, four hundred twenty thousand, two hundred thirteen".