31103333231213 has 4 divisors (see below), whose sum is σ = 31105445813568. Its totient is φ = 31101220648860.

The previous prime is 31103333231203. The next prime is 31103333231221. The reversal of 31103333231213 is 31213233330113.

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 a cyclic number.

It is not a de Polignac number, because 31103333231213 - 2¹⁶ = 31103333165677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103333231203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056269093 + ... + 1056298538.

It is an arithmetic number, because the mean of its divisors is an integer number (7776361453392).

Almost surely, 2^{31103333231213} is an apocalyptic number.

It is an amenable number.

31103333231213 is a deficient number, since it is larger than the sum of its proper divisors (2112582355).

31103333231213 is a wasteful number, since it uses less digits than its factorization.

31103333231213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112582354.

The product of its (nonzero) digits is 8748, while the sum is 29.

Adding to 31103333231213 its reverse (31213233330113), we get a palindrome (62316566561326).

The spelling of 31103333231213 in words is "thirty-one trillion, one hundred three billion, three hundred thirty-three million, two hundred thirty-one thousand, two hundred thirteen".