1002444444221 has 16 divisors (see below), whose sum is σ = 1099280004480. Its totient is φ = 906571414080.

The previous prime is 1002444444203. The next prime is 1002444444223. The reversal of 1002444444221 is 1224444442001.

1002444444221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1002444444221 - 2²⁶ = 1002377335357 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 (1002444444223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1403015 + ... + 1993323.

It is an arithmetic number, because the mean of its divisors is an integer number (68705000280).

Almost surely, 2^{1002444444221} is an apocalyptic number.

1002444444221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1002444444221 is a deficient number, since it is larger than the sum of its proper divisors (96835560259).

1002444444221 is a wasteful number, since it uses less digits than its factorization.

1002444444221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591124.

The product of its (nonzero) digits is 32768, while the sum is 32.

Adding to 1002444444221 its reverse (1224444442001), we get a palindrome (2226888886222).

The spelling of 1002444444221 in words is "one trillion, two billion, four hundred forty-four million, four hundred forty-four thousand, two hundred twenty-one".