2111321331 has 24 divisors (see below), whose sum is σ = 3486938624. Its totient is φ = 1205921520.

The previous prime is 2111321323. The next prime is 2111321369. The reversal of 2111321331 is 1331231112.

2111321331 is a `hidden beast` number, since 2 + 1 + 11 + 321 + 331 = 666.

It is not a de Polignac number, because 2111321331 - 2³ = 2111321323 is a prime.

It is a super-2 number, since 2×2111321331² = 8915355525471223122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111321321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162000 + ... + 174546.

Almost surely, 2^2111321331 is an apocalyptic number.

2111321331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2111321331 is a deficient number, since it is larger than the sum of its proper divisors (1375617293).

2111321331 is a wasteful number, since it uses less digits than its factorization.

2111321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15231 (or 15228 counting only the distinct ones).

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

The square root of 2111321331 is about 45949.1167597376. The cubic root of 2111321331 is about 1282.8762896165.

Adding to 2111321331 its reverse (1331231112), we get a palindrome (3442552443).

The spelling of 2111321331 in words is "two billion, one hundred eleven million, three hundred twenty-one thousand, three hundred thirty-one".