2231324232221 has 24 divisors (see below), whose sum is σ = 2629113672960. Its totient is φ = 1887956465472.

The previous prime is 2231324232211. The next prime is 2231324232287. The reversal of 2231324232221 is 1222324231322.

It is not a de Polignac number, because 2231324232221 - 2⁶ = 2231324232157 is a prime.

It is a super-3 number, since 3×2231324232221³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231324232211) 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, 2225666 + ... + 3068588.

It is an arithmetic number, because the mean of its divisors is an integer number (109546403040).

Almost surely, 2^{2231324232221} is an apocalyptic number.

It is an amenable number.

2231324232221 is a deficient number, since it is larger than the sum of its proper divisors (397789440739).

2231324232221 is an equidigital number, since it uses as much as digits as its factorization.

2231324232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843633 (or 843626 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

Adding to 2231324232221 its reverse (1222324231322), we get a palindrome (3453648463543).

The spelling of 2231324232221 in words is "two trillion, two hundred thirty-one billion, three hundred twenty-four million, two hundred thirty-two thousand, two hundred twenty-one".