1140233221 has 4 divisors (see below), whose sum is σ = 1140304000. Its totient is φ = 1140162444.

The previous prime is 1140233219. The next prime is 1140233243. The reversal of 1140233221 is 1223320411.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1223320411 = 11731 ⋅104281.

It is a cyclic number.

It is not a de Polignac number, because 1140233221 - 2¹ = 1140233219 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 (1140233261) 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, 1810 + ... + 47788.

It is an arithmetic number, because the mean of its divisors is an integer number (285076000).

Almost surely, 2^1140233221 is an apocalyptic number.

It is an amenable number.

1140233221 is a deficient number, since it is larger than the sum of its proper divisors (70779).

1140233221 is an equidigital number, since it uses as much as digits as its factorization.

1140233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70778.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1140233221 is about 33767.3395605872. The cubic root of 1140233221 is about 1044.7151596554.

Adding to 1140233221 its reverse (1223320411), we get a palindrome (2363553632).

The spelling of 1140233221 in words is "one billion, one hundred forty million, two hundred thirty-three thousand, two hundred twenty-one".