1230440221 has 4 divisors (see below), whose sum is σ = 1251295200. Its totient is φ = 1209585244.

The previous prime is 1230440149. The next prime is 1230440257. The reversal of 1230440221 is 1220440321.

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 1230440221 - 2²¹ = 1228343069 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 (1230440621) 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, 10427401 + ... + 10427518.

It is an arithmetic number, because the mean of its divisors is an integer number (312823800).

Almost surely, 2^1230440221 is an apocalyptic number.

It is an amenable number.

1230440221 is a deficient number, since it is larger than the sum of its proper divisors (20854979).

1230440221 is an equidigital number, since it uses as much as digits as its factorization.

1230440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20854978.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1230440221 is about 35077.6313481968. The cubic root of 1230440221 is about 1071.5690785492.

Adding to 1230440221 its reverse (1220440321), we get a palindrome (2450880542).

It can be divided in two parts, 12304 and 40221, that added together give a palindrome (52525).

The spelling of 1230440221 in words is "one billion, two hundred thirty million, four hundred forty thousand, two hundred twenty-one".