1004442221221 has 8 divisors (see below), whose sum is σ = 1004762415384. Its totient is φ = 1004122091520.

The previous prime is 1004442221191. The next prime is 1004442221239. The reversal of 1004442221221 is 1221222444001.

It can be written as a sum of positive squares in 4 ways, for example, as 109316196900 + 895126024321 = 330630^2 + 946111^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1004442221221 - 2²³ = 1004433832613 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 (1004442227221) 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, 60642781 + ... + 60659341.

It is an arithmetic number, because the mean of its divisors is an integer number (125595301923).

Almost surely, 2^{1004442221221} is an apocalyptic number.

It is an amenable number.

1004442221221 is a deficient number, since it is larger than the sum of its proper divisors (320194163).

1004442221221 is an equidigital number, since it uses as much as digits as its factorization.

1004442221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32231.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 1004442221221 its reverse (1221222444001), we get a palindrome (2225664665222).

The spelling of 1004442221221 in words is "one trillion, four billion, four hundred forty-two million, two hundred twenty-one thousand, two hundred twenty-one".