22012210021 has 4 divisors (see below), whose sum is σ = 22722281344. Its totient is φ = 21302138700.

The previous prime is 22012210019. The next prime is 22012210037. The reversal of 22012210021 is 12001221022.

It is a happy number.

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 22012210021 - 2¹ = 22012210019 is a prime.

It is a super-2 number, since 2×22012210021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012209983 and 22012210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012210621) 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, 355035615 + ... + 355035676.

It is an arithmetic number, because the mean of its divisors is an integer number (5680570336).

Almost surely, 2^22012210021 is an apocalyptic number.

It is an amenable number.

22012210021 is a deficient number, since it is larger than the sum of its proper divisors (710071323).

22012210021 is an equidigital number, since it uses as much as digits as its factorization.

22012210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710071322.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22012210021 its reverse (12001221022), we get a palindrome (34013431043).

The spelling of 22012210021 in words is "twenty-two billion, twelve million, two hundred ten thousand, twenty-one".