1244311221 has 8 divisors (see below), whose sum is σ = 1703921824. Its totient is φ = 807120720.

The previous prime is 1244311219. The next prime is 1244311231. The reversal of 1244311221 is 1221134421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1244311221 - 2¹ = 1244311219 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 (1244311231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5604895 + ... + 5605116.

It is an arithmetic number, because the mean of its divisors is an integer number (212990228).

Almost surely, 2^1244311221 is an apocalyptic number.

It is an amenable number.

1244311221 is a deficient number, since it is larger than the sum of its proper divisors (459610603).

1244311221 is a wasteful number, since it uses less digits than its factorization.

1244311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11210051.

The product of its digits is 384, while the sum is 21.

The square root of 1244311221 is about 35274.7958321519. The cubic root of 1244311221 is about 1075.5807126725.

Adding to 1244311221 its reverse (1221134421), we get a palindrome (2465445642).

The spelling of 1244311221 in words is "one billion, two hundred forty-four million, three hundred eleven thousand, two hundred twenty-one".