31010311213 has 4 divisors (see below), whose sum is σ = 35440355680. Its totient is φ = 26580266748.

The previous prime is 31010311193. The next prime is 31010311243. The reversal of 31010311213 is 31211301013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31010311213 - 2¹⁷ = 31010180141 is a prime.

It is a super-2 number, since 2×31010311213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31010311243) 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 in 3 ways as a sum of consecutive naturals, for example, 2215022223 + ... + 2215022236.

It is an arithmetic number, because the mean of its divisors is an integer number (8860088920).

Almost surely, 2^31010311213 is an apocalyptic number.

It is an amenable number.

31010311213 is a deficient number, since it is larger than the sum of its proper divisors (4430044467).

31010311213 is an equidigital number, since it uses as much as digits as its factorization.

31010311213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430044466.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31010311213 its reverse (31211301013), we get a palindrome (62221612226).

The spelling of 31010311213 in words is "thirty-one billion, ten million, three hundred eleven thousand, two hundred thirteen".