1002002144221 has 32 divisors (see below), whose sum is σ = 1193702195840. Its totient is φ = 832735137024.

The previous prime is 1002002144123. The next prime is 1002002144263. The reversal of 1002002144221 is 1224412002001.

It is a cyclic number.

It is not a de Polignac number, because 1002002144221 - 2⁷ = 1002002144093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002002144281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 881910 + ... + 1667863.

It is an arithmetic number, because the mean of its divisors is an integer number (37303193620).

Almost surely, 2^{1002002144221} is an apocalyptic number.

It is an amenable number.

1002002144221 is a deficient number, since it is larger than the sum of its proper divisors (191700051619).

1002002144221 is a wasteful number, since it uses less digits than its factorization.

1002002144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549885.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1002002144221 its reverse (1224412002001), we get a palindrome (2226414146222).

The spelling of 1002002144221 in words is "one trillion, two billion, two million, one hundred forty-four thousand, two hundred twenty-one".