22022000021 has 4 divisors (see below), whose sum is σ = 25168000032. Its totient is φ = 18876000012.

The previous prime is 22022000017. The next prime is 22022000029. The reversal of 22022000021 is 12000022022.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12000022022 = 2 ⋅6000011011.

It is a cyclic number.

It is not a de Polignac number, because 22022000021 - 2² = 22022000017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22021999966 and 22022000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022000029) 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, 1572999995 + ... + 1573000008.

It is an arithmetic number, because the mean of its divisors is an integer number (6292000008).

Almost surely, 2^22022000021 is an apocalyptic number.

It is an amenable number.

22022000021 is a deficient number, since it is larger than the sum of its proper divisors (3146000011).

22022000021 is an equidigital number, since it uses as much as digits as its factorization.

22022000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3146000010.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 22022000021 its reverse (12000022022), we get a palindrome (34022022043).

The spelling of 22022000021 in words is "twenty-two billion, twenty-two million, twenty-one", and thus it is an aban number and an uban number.