2111323231 has 8 divisors (see below), whose sum is σ = 2180018304. Its totient is φ = 2042664960.

The previous prime is 2111323219. The next prime is 2111323261. The reversal of 2111323231 is 1323231112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111323231 - 2¹⁵ = 2111290463 is a prime.

It is a super-2 number, since 2×2111323231² = 8915371571520558722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111323199 and 2111323208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111323261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153135 + ... + 166351.

It is an arithmetic number, because the mean of its divisors is an integer number (272502288).

Almost surely, 2^2111323231 is an apocalyptic number.

2111323231 is a deficient number, since it is larger than the sum of its proper divisors (68695073).

2111323231 is a wasteful number, since it uses less digits than its factorization.

2111323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18401.

The product of its digits is 216, while the sum is 19.

The square root of 2111323231 is about 45949.1374347767. The cubic root of 2111323231 is about 1282.8766744410.

Adding to 2111323231 its reverse (1323231112), we get a palindrome (3434554343).

It can be divided in two parts, 21113 and 23231, that added together give a palindrome (44344).

The spelling of 2111323231 in words is "two billion, one hundred eleven million, three hundred twenty-three thousand, two hundred thirty-one".