1144266221 has 4 divisors (see below), whose sum is σ = 1307732832. Its totient is φ = 980799612.

The previous prime is 1144266217. The next prime is 1144266247. The reversal of 1144266221 is 1226624411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1144266221 - 2² = 1144266217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144266281) 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, 81733295 + ... + 81733308.

It is an arithmetic number, because the mean of its divisors is an integer number (326933208).

Almost surely, 2^1144266221 is an apocalyptic number.

It is an amenable number.

1144266221 is a deficient number, since it is larger than the sum of its proper divisors (163466611).

1144266221 is an equidigital number, since it uses as much as digits as its factorization.

1144266221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163466610.

The product of its digits is 4608, while the sum is 29.

The square root of 1144266221 is about 33827.0043160786. The cubic root of 1144266221 is about 1045.9454279847.

The spelling of 1144266221 in words is "one billion, one hundred forty-four million, two hundred sixty-six thousand, two hundred twenty-one".