22000122122221 has 4 divisors (see below), whose sum is σ = 22047638585152. Its totient is φ = 21952605659292.

The previous prime is 22000122122179. The next prime is 22000122122269. The reversal of 22000122122221 is 12222122100022.

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 22000122122221 - 2⁹ = 22000122121709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000122122021) 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, 23758230771 + ... + 23758231696.

It is an arithmetic number, because the mean of its divisors is an integer number (5511909646288).

Almost surely, 2^{22000122122221} is an apocalyptic number.

It is an amenable number.

22000122122221 is a deficient number, since it is larger than the sum of its proper divisors (47516462931).

22000122122221 is an equidigital number, since it uses as much as digits as its factorization.

22000122122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47516462930.

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

Adding to 22000122122221 its reverse (12222122100022), we get a palindrome (34222244222243).

The spelling of 22000122122221 in words is "twenty-two trillion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".