22222000021 has 8 divisors (see below), whose sum is σ = 23932584704. Its totient is φ = 20511586800.

The previous prime is 22221999949. The next prime is 22222000039. The reversal of 22222000021 is 12000022222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22222000021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221999965 and 22222000010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222006021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383296 + ... + 437446.

It is an arithmetic number, because the mean of its divisors is an integer number (2991573088).

Almost surely, 2^22222000021 is an apocalyptic number.

It is an amenable number.

22222000021 is a deficient number, since it is larger than the sum of its proper divisors (1710584683).

22222000021 is a wasteful number, since it uses less digits than its factorization.

22222000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85731.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 22222000021 its reverse (12000022222), we get a palindrome (34222022243).

The spelling of 22222000021 in words is "twenty-two billion, two hundred twenty-two million, twenty-one", and thus it is an aban number.