1002202112221 has 4 divisors (see below), whose sum is σ = 1002208116672. Its totient is φ = 1002196107772.

The previous prime is 1002202112213. The next prime is 1002202112239. The reversal of 1002202112221 is 1222112022001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1002202112221 - 2³ = 1002202112213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002202112195 and 1002202112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002202112621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2744485 + ... + 3088138.

It is an arithmetic number, because the mean of its divisors is an integer number (250552029168).

Almost surely, 2^{1002202112221} is an apocalyptic number.

It is an amenable number.

1002202112221 is a deficient number, since it is larger than the sum of its proper divisors (6004451).

1002202112221 is an equidigital number, since it uses as much as digits as its factorization.

1002202112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6004450.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1002202112221 its reverse (1222112022001), we get a palindrome (2224314134222).

The spelling of 1002202112221 in words is "one trillion, two billion, two hundred two million, one hundred twelve thousand, two hundred twenty-one".