1040331221 has 4 divisors (see below), whose sum is σ = 1040554944. Its totient is φ = 1040107500.

The previous prime is 1040331217. The next prime is 1040331233. The reversal of 1040331221 is 1221330401.

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 an emirpimes, since its reverse is a distinct semiprime: 1221330401 = 241 ⋅5067761.

It is a cyclic number.

It is not a de Polignac number, because 1040331221 - 2² = 1040331217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1040331221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040331211) 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, 104735 + ... + 114236.

It is an arithmetic number, because the mean of its divisors is an integer number (260138736).

Almost surely, 2^1040331221 is an apocalyptic number.

It is an amenable number.

1040331221 is a deficient number, since it is larger than the sum of its proper divisors (223723).

1040331221 is an equidigital number, since it uses as much as digits as its factorization.

1040331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223722.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1040331221 is about 32254.1659479826. The cubic root of 1040331221 is about 1013.2669499906.

Adding to 1040331221 its reverse (1221330401), we get a palindrome (2261661622).

The spelling of 1040331221 in words is "one billion, forty million, three hundred thirty-one thousand, two hundred twenty-one".