31122132211311 has 4 divisors (see below), whose sum is σ = 41496176281752. Its totient is φ = 20748088140872.

The previous prime is 31122132211309. The next prime is 31122132211351. The reversal of 31122132211311 is 11311223122113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31122132211311 - 2¹ = 31122132211309 is a prime.

It is a super-2 number, since 2×31122132211311² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122132211351) 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, 5187022035216 + ... + 5187022035221.

It is an arithmetic number, because the mean of its divisors is an integer number (10374044070438).

Almost surely, 2^{31122132211311} is an apocalyptic number.

31122132211311 is a deficient number, since it is larger than the sum of its proper divisors (10374044070441).

31122132211311 is a wasteful number, since it uses less digits than its factorization.

31122132211311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10374044070440.

The product of its digits is 432, while the sum is 24.

Adding to 31122132211311 its reverse (11311223122113), we get a palindrome (42433355333424).

The spelling of 31122132211311 in words is "thirty-one trillion, one hundred twenty-two billion, one hundred thirty-two million, two hundred eleven thousand, three hundred eleven".