211313122331 has 4 divisors (see below), whose sum is σ = 212977005312. Its totient is φ = 209649239352.

The previous prime is 211313122283. The next prime is 211313122343. The reversal of 211313122331 is 133221313112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211313122331 is a prime.

It is a super-2 number, since 2×211313122331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211313122297 and 211313122306.

It is not an unprimeable number, because it can be changed into a prime (211313122831) 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, 831941300 + ... + 831941553.

It is an arithmetic number, because the mean of its divisors is an integer number (53244251328).

Almost surely, 2^211313122331 is an apocalyptic number.

211313122331 is a deficient number, since it is larger than the sum of its proper divisors (1663882981).

211313122331 is a wasteful number, since it uses less digits than its factorization.

211313122331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663882980.

The product of its digits is 648, while the sum is 23.

Adding to 211313122331 its reverse (133221313112), we get a palindrome (344534435443).

The spelling of 211313122331 in words is "two hundred eleven billion, three hundred thirteen million, one hundred twenty-two thousand, three hundred thirty-one".