2123231331 has 32 divisors (see below), whose sum is σ = 3117647680. Its totient is φ = 1284940800.

The previous prime is 2123231321. The next prime is 2123231333. The reversal of 2123231331 is 1331323212.

It is not a de Polignac number, because 2123231331 - 2⁶ = 2123231267 is a prime.

It is a super-2 number, since 2×2123231331² = 9016222569880063122, 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 = 2123231298 and 2123231307.

It is not an unprimeable number, because it can be changed into a prime (2123231333) 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, 399411 + ... + 404691.

It is an arithmetic number, because the mean of its divisors is an integer number (97426490).

Almost surely, 2^2123231331 is an apocalyptic number.

2123231331 is a deficient number, since it is larger than the sum of its proper divisors (994416349).

2123231331 is an equidigital number, since it uses as much as digits as its factorization.

2123231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5384 (or 5358 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 2123231331 is about 46078.5343842445. The cubic root of 2123231331 is about 1285.2840103611.

Adding to 2123231331 its reverse (1331323212), we get a palindrome (3454554543).

The spelling of 2123231331 in words is "two billion, one hundred twenty-three million, two hundred thirty-one thousand, three hundred thirty-one".