1002101220221 has 4 divisors (see below), whose sum is σ = 1003206073632. Its totient is φ = 1000996366812.

The previous prime is 1002101220209. The next prime is 1002101220223. The reversal of 1002101220221 is 1220221012001.

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 1002101220221 - 2³⁸ = 727223313277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002101220196 and 1002101220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002101220223) 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, 552425345 + ... + 552427158.

It is an arithmetic number, because the mean of its divisors is an integer number (250801518408).

Almost surely, 2^{1002101220221} is an apocalyptic number.

It is an amenable number.

1002101220221 is a deficient number, since it is larger than the sum of its proper divisors (1104853411).

1002101220221 is an equidigital number, since it uses as much as digits as its factorization.

1002101220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104853410.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1002101220221 its reverse (1220221012001), we get a palindrome (2222322232222).

The spelling of 1002101220221 in words is "one trillion, two billion, one hundred one million, two hundred twenty thousand, two hundred twenty-one".