1232423421321 has 4 divisors (see below), whose sum is σ = 1643231228432. Its totient is φ = 821615614212.

The previous prime is 1232423421259. The next prime is 1232423421323. The reversal of 1232423421321 is 1231243242321.

It is a happy number.

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 not a de Polignac number, because 1232423421321 - 2¹⁰ = 1232423420297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232423421323) 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, 205403903551 + ... + 205403903556.

It is an arithmetic number, because the mean of its divisors is an integer number (410807807108).

Almost surely, 2^{1232423421321} is an apocalyptic number.

It is an amenable number.

1232423421321 is a deficient number, since it is larger than the sum of its proper divisors (410807807111).

1232423421321 is an equidigital number, since it uses as much as digits as its factorization.

1232423421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410807807110.

The product of its digits is 13824, while the sum is 30.

Adding to 1232423421321 its reverse (1231243242321), we get a palindrome (2463666663642).

The spelling of 1232423421321 in words is "one trillion, two hundred thirty-two billion, four hundred twenty-three million, four hundred twenty-one thousand, three hundred twenty-one".