2311311321 has 32 divisors (see below), whose sum is σ = 3762393600. Its totient is φ = 1390692240.

The previous prime is 2311311307. The next prime is 2311311323. The reversal of 2311311321 is 1231131132.

2311311321 is a `hidden beast` number, since 2 + 31 + 1 + 311 + 321 = 666.

It is not a de Polignac number, because 2311311321 - 2⁹ = 2311310809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2311311294 and 2311311303.

It is not an unprimeable number, because it can be changed into a prime (2311311323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13290 + ... + 69276.

It is an arithmetic number, because the mean of its divisors is an integer number (117574800).

Almost surely, 2^2311311321 is an apocalyptic number.

It is an amenable number.

2311311321 is a deficient number, since it is larger than the sum of its proper divisors (1451082279).

2311311321 is a wasteful number, since it uses less digits than its factorization.

2311311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56146 (or 56140 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 2311311321 is about 48076.0992698035. The cubic root of 2311311321 is about 1322.1664990258.

Adding to 2311311321 its reverse (1231131132), we get a palindrome (3542442453).

The spelling of 2311311321 in words is "two billion, three hundred eleven million, three hundred eleven thousand, three hundred twenty-one".