1144213221 has 16 divisors (see below), whose sum is σ = 1549877120. Its totient is φ = 750772800.

The previous prime is 1144213211. The next prime is 1144213243. The reversal of 1144213221 is 1223124411.

It is not a de Polignac number, because 1144213221 - 2⁹ = 1144212709 is a prime.

It is a super-2 number, since 2×1144213221² = 2618447790222389682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144213201) 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, 37791 + ... + 60963.

It is an arithmetic number, because the mean of its divisors is an integer number (96867320).

Almost surely, 2^1144213221 is an apocalyptic number.

It is an amenable number.

1144213221 is a deficient number, since it is larger than the sum of its proper divisors (405663899).

1144213221 is a wasteful number, since it uses less digits than its factorization.

1144213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23436.

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

The square root of 1144213221 is about 33826.2209092296. The cubic root of 1144213221 is about 1045.9292790727.

Adding to 1144213221 its reverse (1223124411), we get a palindrome (2367337632).

The spelling of 1144213221 in words is "one billion, one hundred forty-four million, two hundred thirteen thousand, two hundred twenty-one".