31312222133311 has 16 divisors (see below), whose sum is σ = 36187820651520. Its totient is φ = 26537235278400.

The previous prime is 31312222133293. The next prime is 31312222133327. The reversal of 31312222133311 is 11333122221313.

It is not a de Polignac number, because 31312222133311 - 2¹⁹ = 31312221609023 is a prime.

It is a super-2 number, since 2×31312222133311² (a number of 28 digits) contains 22 as substring.

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 31312222133311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312222143311) 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, 100026486 + ... + 100339036.

It is an arithmetic number, because the mean of its divisors is an integer number (2261738790720).

Almost surely, 2^{31312222133311} is an apocalyptic number.

31312222133311 is a deficient number, since it is larger than the sum of its proper divisors (4875598518209).

31312222133311 is a wasteful number, since it uses less digits than its factorization.

31312222133311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473454.

The product of its digits is 3888, while the sum is 28.

Adding to 31312222133311 its reverse (11333122221313), we get a palindrome (42645344354624).

The spelling of 31312222133311 in words is "thirty-one trillion, three hundred twelve billion, two hundred twenty-two million, one hundred thirty-three thousand, three hundred eleven".