22120222000021 has 8 divisors (see below), whose sum is σ = 23427283100760. Its totient is φ = 20813813296128.

The previous prime is 22120221999977. The next prime is 22120222000069. The reversal of 22120222000021 is 12000022202122.

It can be written as a sum of positive squares in 4 ways, for example, as 1538021628900 + 20582200371121 = 1240170^2 + 4536761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22120222000021 - 2⁹ = 22120221999509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120221999959 and 22120222000004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120222000081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163029396 + ... + 163165021.

It is an arithmetic number, because the mean of its divisors is an integer number (2928410387595).

Almost surely, 2^{22120222000021} is an apocalyptic number.

It is an amenable number.

22120222000021 is a deficient number, since it is larger than the sum of its proper divisors (1307061100739).

22120222000021 is a wasteful number, since it uses less digits than its factorization.

22120222000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326198423.

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

Adding to 22120222000021 its reverse (12000022202122), we get a palindrome (34120244202143).

The spelling of 22120222000021 in words is "twenty-two trillion, one hundred twenty billion, two hundred twenty-two million, twenty-one", and thus it is an aban number.