313131021211222 has 16 divisors (see below), whose sum is σ = 488765803711680. Its totient is φ = 150332512348872.

The previous prime is 313131021211157. The next prime is 313131021211289. The reversal of 313131021211222 is 222112120131313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30856421928 + ... + 30856432075.

It is an arithmetic number, because the mean of its divisors is an integer number (30547862731980).

Almost surely, 2^{313131021211222} is an apocalyptic number.

313131021211222 is a deficient number, since it is larger than the sum of its proper divisors (175634782500458).

313131021211222 is a wasteful number, since it uses less digits than its factorization.

313131021211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61712854107.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 313131021211222 its reverse (222112120131313), we get a palindrome (535243141342535).

The spelling of 313131021211222 in words is "three hundred thirteen trillion, one hundred thirty-one billion, twenty-one million, two hundred eleven thousand, two hundred twenty-two".