2111331321 has 24 divisors (see below), whose sum is σ = 3397739904. Its totient is φ = 1252366560.

The previous prime is 2111331301. The next prime is 2111331349. The reversal of 2111331321 is 1231331112.

2111331321 is a `hidden beast` number, since 2 + 1 + 11 + 331 + 321 = 666.

It is not a de Polignac number, because 2111331321 - 2¹³ = 2111323129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2111331294 and 2111331303.

It is not an unprimeable number, because it can be changed into a prime (2111331301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222226 + ... + 231531.

It is an arithmetic number, because the mean of its divisors is an integer number (141572496).

Almost surely, 2^2111331321 is an apocalyptic number.

It is an amenable number.

2111331321 is a deficient number, since it is larger than the sum of its proper divisors (1286408583).

2111331321 is a wasteful number, since it uses less digits than its factorization.

2111331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453821 (or 453818 counting only the distinct ones).

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

The square root of 2111331321 is about 45949.2254668128. The cubic root of 2111331321 is about 1282.8783129804.

Adding to 2111331321 its reverse (1231331112), we get a palindrome (3342662433).

The spelling of 2111331321 in words is "two billion, one hundred eleven million, three hundred thirty-one thousand, three hundred twenty-one".