1040221221 has 8 divisors (see below), whose sum is σ = 1493651040. Its totient is φ = 640136112.

The previous prime is 1040221201. The next prime is 1040221223. The reversal of 1040221221 is 1221220401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1040221221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1040221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040221223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13336131 + ... + 13336208.

It is an arithmetic number, because the mean of its divisors is an integer number (186706380).

Almost surely, 2^1040221221 is an apocalyptic number.

It is an amenable number.

1040221221 is a deficient number, since it is larger than the sum of its proper divisors (453429819).

1040221221 is a wasteful number, since it uses less digits than its factorization.

1040221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26672355.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1040221221 is about 32252.4606968213. The cubic root of 1040221221 is about 1013.2312359504.

Adding to 1040221221 its reverse (1221220401), we get a palindrome (2261441622).

The spelling of 1040221221 in words is "one billion, forty million, two hundred twenty-one thousand, two hundred twenty-one".