313013131001221 has 16 divisors (see below), whose sum is σ = 357817490325504. Its totient is φ = 268230823979184.

The previous prime is 313013131001167. The next prime is 313013131001237. The reversal of 313013131001221 is 122100131310313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313013131001221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313013131001192 and 313013131001201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313013131001281) 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, 1756211316 + ... + 1756389538.

It is an arithmetic number, because the mean of its divisors is an integer number (22363593145344).

Almost surely, 2^{313013131001221} is an apocalyptic number.

It is an amenable number.

313013131001221 is a deficient number, since it is larger than the sum of its proper divisors (44804359324283).

313013131001221 is a wasteful number, since it uses less digits than its factorization.

313013131001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238680.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 313013131001221 its reverse (122100131310313), we get a palindrome (435113262311534).

The spelling of 313013131001221 in words is "three hundred thirteen trillion, thirteen billion, one hundred thirty-one million, one thousand, two hundred twenty-one".