210131023213 has 2 divisors, whose sum is σ = 210131023214. Its totient is φ = 210131023212.

The previous prime is 210131023199. The next prime is 210131023307. The reversal of 210131023213 is 312320131012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135897661449 + 74233361764 = 368643^2 + 272458^2 .

It is a cyclic number.

It is not a de Polignac number, because 210131023213 - 2¹³ = 210131015021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210131023513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105065511606 + 105065511607.

It is an arithmetic number, because the mean of its divisors is an integer number (105065511607).

Almost surely, 2^210131023213 is an apocalyptic number.

It is an amenable number.

210131023213 is a deficient number, since it is larger than the sum of its proper divisors (1).

210131023213 is an equidigital number, since it uses as much as digits as its factorization.

210131023213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 210131023213 its reverse (312320131012), we get a palindrome (522451154225).

The spelling of 210131023213 in words is "two hundred ten billion, one hundred thirty-one million, twenty-three thousand, two hundred thirteen".