1244322221 has 4 divisors (see below), whose sum is σ = 1247908512. Its totient is φ = 1240735932.

The previous prime is 1244322203. The next prime is 1244322239. The reversal of 1244322221 is 1222234421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1222234421 = 23 ⋅53140627.

It is an interprime number because it is at equal distance from previous prime (1244322203) and next prime (1244322239).

It is a cyclic number.

It is not a de Polignac number, because 1244322221 - 2²⁶ = 1177213357 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 (1244322281) 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, 1792625 + ... + 1793318.

It is an arithmetic number, because the mean of its divisors is an integer number (311977128).

Almost surely, 2^1244322221 is an apocalyptic number.

It is an amenable number.

1244322221 is a deficient number, since it is larger than the sum of its proper divisors (3586291).

1244322221 is an equidigital number, since it uses as much as digits as its factorization.

1244322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3586290.

The product of its digits is 1536, while the sum is 23.

The square root of 1244322221 is about 35274.9517504985. The cubic root of 1244322221 is about 1075.5838821242.

Adding to 1244322221 its reverse (1222234421), we get a palindrome (2466556642).

The spelling of 1244322221 in words is "one billion, two hundred forty-four million, three hundred twenty-two thousand, two hundred twenty-one".