31221433412213 has 16 divisors (see below), whose sum is σ = 34231474838400. Its totient is φ = 28240018329600.

The previous prime is 31221433412131. The next prime is 31221433412227.

31221433412213 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31221433412213 - 2¹² = 31221433408117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31221433412213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221433412413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242864393 + ... + 242992913.

It is an arithmetic number, because the mean of its divisors is an integer number (2139467177400).

Almost surely, 2^{31221433412213} is an apocalyptic number.

It is an amenable number.

31221433412213 is a deficient number, since it is larger than the sum of its proper divisors (3010041426187).

31221433412213 is a wasteful number, since it uses less digits than its factorization.

31221433412213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239708.

The product of its digits is 20736, while the sum is 32.

It can be divided in two parts, 3122143 and 3412213, that added together give a palindrome (6534356).

The spelling of 31221433412213 in words is "thirty-one trillion, two hundred twenty-one billion, four hundred thirty-three million, four hundred twelve thousand, two hundred thirteen".