1040210221 has 4 divisors (see below), whose sum is σ = 1065581244. Its totient is φ = 1014839200.

The previous prime is 1040210209. The next prime is 1040210231. The reversal of 1040210221 is 1220120401.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 525555625 + 514654596 = 22925^2 + 22686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040210221 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 (1040210231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12685450 + ... + 12685531.

It is an arithmetic number, because the mean of its divisors is an integer number (266395311).

Almost surely, 2^1040210221 is an apocalyptic number.

It is an amenable number.

1040210221 is a deficient number, since it is larger than the sum of its proper divisors (25371023).

1040210221 is an equidigital number, since it uses as much as digits as its factorization.

1040210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25371022.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1040210221 is about 32252.2901667463. The cubic root of 1040210221 is about 1013.2276644080.

Adding to 1040210221 its reverse (1220120401), we get a palindrome (2260330622).

The spelling of 1040210221 in words is "one billion, forty million, two hundred ten thousand, two hundred twenty-one".