22012000021 has 8 divisors (see below), whose sum is σ = 24188370624. Its totient is φ = 19864842720.

The previous prime is 22011999983. The next prime is 22012000037. The reversal of 22012000021 is 12000021022.

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 22012000021 - 2⁹ = 22011999509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22011999971 and 22012000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012000321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7301745 + ... + 7304758.

It is an arithmetic number, because the mean of its divisors is an integer number (3023546328).

Almost surely, 2^22012000021 is an apocalyptic number.

It is an amenable number.

22012000021 is a deficient number, since it is larger than the sum of its proper divisors (2176370603).

22012000021 is a wasteful number, since it uses less digits than its factorization.

22012000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14606651.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 22012000021 its reverse (12000021022), we get a palindrome (34012021043).

The spelling of 22012000021 in words is "twenty-two billion, twelve million, twenty-one", and thus it is an aban number and an uban number.