3131223120213 has 4 divisors (see below), whose sum is σ = 4174964160288. Its totient is φ = 2087482080140.

The previous prime is 3131223120197. The next prime is 3131223120217. The reversal of 3131223120213 is 3120213221313.

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 3131223120213 - 2⁴ = 3131223120197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131223120217) 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, 521870520033 + ... + 521870520038.

It is an arithmetic number, because the mean of its divisors is an integer number (1043741040072).

Almost surely, 2^{3131223120213} is an apocalyptic number.

It is an amenable number.

3131223120213 is a deficient number, since it is larger than the sum of its proper divisors (1043741040075).

3131223120213 is a wasteful number, since it uses less digits than its factorization.

3131223120213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043741040074.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 3131223120213 its reverse (3120213221313), we get a palindrome (6251436341526).

The spelling of 3131223120213 in words is "three trillion, one hundred thirty-one billion, two hundred twenty-three million, one hundred twenty thousand, two hundred thirteen".