31321211311223 has 4 divisors (see below), whose sum is σ = 31513365982008. Its totient is φ = 31129056640440.

The previous prime is 31321211311219. The next prime is 31321211311261. The reversal of 31321211311223 is 32211311212313.

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 31321211311223 - 2² = 31321211311219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31321211311192 and 31321211311201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321211311123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96077335148 + ... + 96077335473.

It is an arithmetic number, because the mean of its divisors is an integer number (7878341495502).

Almost surely, 2^{31321211311223} is an apocalyptic number.

31321211311223 is a deficient number, since it is larger than the sum of its proper divisors (192154670785).

31321211311223 is a wasteful number, since it uses less digits than its factorization.

31321211311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192154670784.

The product of its digits is 1296, while the sum is 26.

Adding to 31321211311223 its reverse (32211311212313), we get a palindrome (63532522523536).

The spelling of 31321211311223 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred eleven million, three hundred eleven thousand, two hundred twenty-three".