31103313213023 has 4 divisors (see below), whose sum is σ = 31103346967368. Its totient is φ = 31103279458680.

The previous prime is 31103313213019. The next prime is 31103313213031. The reversal of 31103313213023 is 32031231330113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31103313213023 - 2² = 31103313213019 is a prime.

It is a super-2 number, since 2×31103313213023² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31103313212983 and 31103313213001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103313213223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15455036 + ... + 17351217.

It is an arithmetic number, because the mean of its divisors is an integer number (7775836741842).

Almost surely, 2^{31103313213023} is an apocalyptic number.

31103313213023 is a deficient number, since it is larger than the sum of its proper divisors (33754345).

31103313213023 is an equidigital number, since it uses as much as digits as its factorization.

31103313213023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33754344.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31103313213023 its reverse (32031231330113), we get a palindrome (63134544543136).

The spelling of 31103313213023 in words is "thirty-one trillion, one hundred three billion, three hundred thirteen million, two hundred thirteen thousand, twenty-three".