1244323221 has 16 divisors (see below), whose sum is σ = 1668294144. Its totient is φ = 824962544.

The previous prime is 1244323217. The next prime is 1244323231. The reversal of 1244323221 is 1223234421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1244323221 - 2² = 1244323217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1244323191 and 1244323200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244323231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651550 + ... + 653456.

It is an arithmetic number, because the mean of its divisors is an integer number (104268384).

Almost surely, 2^1244323221 is an apocalyptic number.

It is an amenable number.

1244323221 is a deficient number, since it is larger than the sum of its proper divisors (423970923).

1244323221 is a wasteful number, since it uses less digits than its factorization.

1244323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000.

The product of its digits is 2304, while the sum is 24.

The square root of 1244323221 is about 35274.9659248595. The cubic root of 1244323221 is about 1075.5841702552.

Adding to 1244323221 its reverse (1223234421), we get a palindrome (2467557642).

The spelling of 1244323221 in words is "one billion, two hundred forty-four million, three hundred twenty-three thousand, two hundred twenty-one".