1221341144 has 16 divisors (see below), whose sum is σ = 2296062600. Its totient is φ = 609057792.

The previous prime is 1221341137. The next prime is 1221341159. The reversal of 1221341144 is 4411431221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198377 + ... + 204440.

Almost surely, 2^1221341144 is an apocalyptic number.

It is an amenable number.

1221341144 is a deficient number, since it is larger than the sum of its proper divisors (1074721456).

1221341144 is a wasteful number, since it uses less digits than its factorization.

1221341144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403202 (or 403198 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 1221341144 is about 34947.6915403579. The cubic root of 1221341144 is about 1068.9211310886.

Adding to 1221341144 its reverse (4411431221), we get a palindrome (5632772365).

The spelling of 1221341144 in words is "one billion, two hundred twenty-one million, three hundred forty-one thousand, one hundred forty-four".