2321221231 has 16 divisors (see below), whose sum is σ = 2743248384. Its totient is φ = 1922922144.

The previous prime is 2321221183. The next prime is 2321221267. The reversal of 2321221231 is 1321221232.

2321221231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2321221231 - 2¹¹ = 2321219183 is a prime.

It is a super-2 number, since 2×2321221231² = 10776136006490310722, 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 = 2321221199 and 2321221208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321222231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21835 + ... + 71548.

It is an arithmetic number, because the mean of its divisors is an integer number (171453024).

Almost surely, 2^2321221231 is an apocalyptic number.

2321221231 is a deficient number, since it is larger than the sum of its proper divisors (422027153).

2321221231 is an equidigital number, since it uses as much as digits as its factorization.

2321221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93510.

The product of its digits is 288, while the sum is 19.

The square root of 2321221231 is about 48179.0538616109. The cubic root of 2321221231 is about 1324.0534321177.

Adding to 2321221231 its reverse (1321221232), we get a palindrome (3642442463).

Subtracting from 2321221231 its reverse (1321221232), we obtain a palindrome (999999999).

The spelling of 2321221231 in words is "two billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred thirty-one".