1232343431221 has 4 divisors (see below), whose sum is σ = 1408392492832. Its totient is φ = 1056294369612.

The previous prime is 1232343431213. The next prime is 1232343431227. The reversal of 1232343431221 is 1221343432321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1232343431221 - 2³ = 1232343431213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232343431227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88024530795 + ... + 88024530808.

It is an arithmetic number, because the mean of its divisors is an integer number (352098123208).

Almost surely, 2^{1232343431221} is an apocalyptic number.

It is an amenable number.

1232343431221 is a deficient number, since it is larger than the sum of its proper divisors (176049061611).

1232343431221 is an equidigital number, since it uses as much as digits as its factorization.

1232343431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176049061610.

The product of its digits is 20736, while the sum is 31.

Adding to 1232343431221 its reverse (1221343432321), we get a palindrome (2453686863542).

The spelling of 1232343431221 in words is "one trillion, two hundred thirty-two billion, three hundred forty-three million, four hundred thirty-one thousand, two hundred twenty-one".