1144221011 has 4 divisors (see below), whose sum is σ = 1144532400. Its totient is φ = 1143909624.

The previous prime is 1144221007. The next prime is 1144221017. The reversal of 1144221011 is 1101224411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1101224411 = 7 ⋅157317773.

It is a cyclic number.

It is not a de Polignac number, because 1144221011 - 2² = 1144221007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144221017) 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, 150116 + ... + 157553.

It is an arithmetic number, because the mean of its divisors is an integer number (286133100).

Almost surely, 2^1144221011 is an apocalyptic number.

1144221011 is a deficient number, since it is larger than the sum of its proper divisors (311389).

1144221011 is an equidigital number, since it uses as much as digits as its factorization.

1144221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311388.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1144221011 is about 33826.3360563925. The cubic root of 1144221011 is about 1045.9316526894.

Adding to 1144221011 its reverse (1101224411), we get a palindrome (2245445422).

The spelling of 1144221011 in words is "one billion, one hundred forty-four million, two hundred twenty-one thousand, eleven".