1404004343221 has 4 divisors (see below), whose sum is σ = 1408796167212. Its totient is φ = 1399212519232.

The previous prime is 1404004343177. The next prime is 1404004343237. The reversal of 1404004343221 is 1223434004041.

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 1200142160100 + 203862183121 = 1095510^2 + 451511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1404004343221 - 2¹⁵ = 1404004310453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1404004343221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404004343251) 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, 2395911556 + ... + 2395912141.

It is an arithmetic number, because the mean of its divisors is an integer number (352199041803).

Almost surely, 2^{1404004343221} is an apocalyptic number.

It is an amenable number.

1404004343221 is a deficient number, since it is larger than the sum of its proper divisors (4791823991).

1404004343221 is an equidigital number, since it uses as much as digits as its factorization.

1404004343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791823990.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1404004343221 its reverse (1223434004041), we get a palindrome (2627438347262).

The spelling of 1404004343221 in words is "one trillion, four hundred four billion, four million, three hundred forty-three thousand, two hundred twenty-one".