10202110121221 has 4 divisors (see below), whose sum is σ = 10531210447744. Its totient is φ = 9873009794700.

The previous prime is 10202110121213. The next prime is 10202110121249. The reversal of 10202110121221 is 12212101120201.

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 10202110121221 - 2³ = 10202110121213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202110121195 and 10202110121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202110121321) 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, 164550163215 + ... + 164550163276.

It is an arithmetic number, because the mean of its divisors is an integer number (2632802611936).

Almost surely, 2^{10202110121221} is an apocalyptic number.

It is an amenable number.

10202110121221 is a deficient number, since it is larger than the sum of its proper divisors (329100326523).

10202110121221 is an equidigital number, since it uses as much as digits as its factorization.

10202110121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329100326522.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10202110121221 its reverse (12212101120201), we get a palindrome (22414211241422).

The spelling of 10202110121221 in words is "ten trillion, two hundred two billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".