221122020202021 has 4 divisors (see below), whose sum is σ = 221362631759200. Its totient is φ = 220881408644844.

The previous prime is 221122020201983. The next prime is 221122020202049. The reversal of 221122020202021 is 120202020221122.

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 221122020202021 - 2²⁹ = 221121483331109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221122020202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122020212021) 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, 120305777211 + ... + 120305779048.

It is an arithmetic number, because the mean of its divisors is an integer number (55340657939800).

Almost surely, 2^{221122020202021} is an apocalyptic number.

It is an amenable number.

221122020202021 is a deficient number, since it is larger than the sum of its proper divisors (240611557179).

221122020202021 is an equidigital number, since it uses as much as digits as its factorization.

221122020202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240611557178.

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

Adding to 221122020202021 its reverse (120202020221122), we get a palindrome (341324040423143).

The spelling of 221122020202021 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, twenty million, two hundred two thousand, twenty-one".