22011020210221 has 4 divisors (see below), whose sum is σ = 25155451668832. Its totient is φ = 18866588751612.

The previous prime is 22011020210209. The next prime is 22011020210251. The reversal of 22011020210221 is 12201202011022.

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 not a de Polignac number, because 22011020210221 - 2¹⁹ = 22011019685933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011020210195 and 22011020210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011020210251) 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, 1572215729295 + ... + 1572215729308.

It is an arithmetic number, because the mean of its divisors is an integer number (6288862917208).

Almost surely, 2^{22011020210221} is an apocalyptic number.

It is an amenable number.

22011020210221 is a deficient number, since it is larger than the sum of its proper divisors (3144431458611).

22011020210221 is an equidigital number, since it uses as much as digits as its factorization.

22011020210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144431458610.

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

Adding to 22011020210221 its reverse (12201202011022), we get a palindrome (34212222221243).

The spelling of 22011020210221 in words is "twenty-two trillion, eleven billion, twenty million, two hundred ten thousand, two hundred twenty-one".