22021011020221 has 4 divisors (see below), whose sum is σ = 22394248495200. Its totient is φ = 21647773545244.

The previous prime is 22021011020213. The next prime is 22021011020233. The reversal of 22021011020221 is 12202011012022.

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 22021011020221 - 2³ = 22021011020213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22021011020195 and 22021011020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021011020621) 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, 186618737401 + ... + 186618737518.

It is an arithmetic number, because the mean of its divisors is an integer number (5598562123800).

Almost surely, 2^{22021011020221} is an apocalyptic number.

It is an amenable number.

22021011020221 is a deficient number, since it is larger than the sum of its proper divisors (373237474979).

22021011020221 is an equidigital number, since it uses as much as digits as its factorization.

22021011020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373237474978.

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

Adding to 22021011020221 its reverse (12202011012022), we get a palindrome (34223022032243).

The spelling of 22021011020221 in words is "twenty-two trillion, twenty-one billion, eleven million, twenty thousand, two hundred twenty-one".