31220122333213 has 48 divisors (see below), whose sum is σ = 36182325196800. Its totient is φ = 26711071443360.

The previous prime is 31220122333187. The next prime is 31220122333259. The reversal of 31220122333213 is 31233322102213.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-31220122333213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220122333313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 724292820 + ... + 724335922.

It is an arithmetic number, because the mean of its divisors is an integer number (753798441600).

Almost surely, 2^{31220122333213} is an apocalyptic number.

It is an amenable number.

31220122333213 is a deficient number, since it is larger than the sum of its proper divisors (4962202863587).

31220122333213 is a wasteful number, since it uses less digits than its factorization.

31220122333213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44350 (or 44331 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 31220122333213 its reverse (31233322102213), we get a palindrome (62453444435426).

The spelling of 31220122333213 in words is "thirty-one trillion, two hundred twenty billion, one hundred twenty-two million, three hundred thirty-three thousand, two hundred thirteen".