31031213021313 has 12 divisors (see below), whose sum is σ = 41949494974800. Its totient is φ = 20404085263776.

The previous prime is 31031213021279. The next prime is 31031213021321. The reversal of 31031213021313 is 31312031213013.

It is not a de Polignac number, because 31031213021313 - 2¹⁶ = 31031212955777 is a prime.

It is a super-3 number, since 3×31031213021313³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31031213021353) 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 11 ways as a sum of consecutive naturals, for example, 970497963 + ... + 970529936.

It is an arithmetic number, because the mean of its divisors is an integer number (3495791247900).

Almost surely, 2^{31031213021313} is an apocalyptic number.

It is an amenable number.

31031213021313 is a deficient number, since it is larger than the sum of its proper divisors (10918281953487).

31031213021313 is an equidigital number, since it uses as much as digits as its factorization.

31031213021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941028048 (or 1941027975 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31031213021313 its reverse (31312031213013), we get a palindrome (62343244234326).

The spelling of 31031213021313 in words is "thirty-one trillion, thirty-one billion, two hundred thirteen million, twenty-one thousand, three hundred thirteen".