22222201021 has 4 divisors (see below), whose sum is σ = 22231671712. Its totient is φ = 22212730332.

The previous prime is 22222201009. The next prime is 22222201063. The reversal of 22222201021 is 12010222222.

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 22222201021 - 2¹⁵ = 22222168253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22222200986 and 22222201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222201121) 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, 4731825 + ... + 4736518.

It is an arithmetic number, because the mean of its divisors is an integer number (5557917928).

Almost surely, 2^22222201021 is an apocalyptic number.

It is an amenable number.

22222201021 is a deficient number, since it is larger than the sum of its proper divisors (9470691).

22222201021 is an equidigital number, since it uses as much as digits as its factorization.

22222201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9470690.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22222201021 its reverse (12010222222), we get a palindrome (34232423243).

The spelling of 22222201021 in words is "twenty-two billion, two hundred twenty-two million, two hundred one thousand, twenty-one".