2005005144221 has 4 divisors (see below), whose sum is σ = 2005409628732. Its totient is φ = 2004600659712.

The previous prime is 2005005144217. The next prime is 2005005144229. The reversal of 2005005144221 is 1224415005002.

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 1806365568121 + 198639576100 = 1344011^2 + 445690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005005144221 - 2² = 2005005144217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005005144229) 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, 202234820 + ... + 202244733.

It is an arithmetic number, because the mean of its divisors is an integer number (501352407183).

Almost surely, 2^{2005005144221} is an apocalyptic number.

It is an amenable number.

2005005144221 is a deficient number, since it is larger than the sum of its proper divisors (404484511).

2005005144221 is an equidigital number, since it uses as much as digits as its factorization.

2005005144221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404484510.

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 2005005144221 in words is "two trillion, five billion, five million, one hundred forty-four thousand, two hundred twenty-one".