22212130021 has 4 divisors (see below), whose sum is σ = 22212437632. Its totient is φ = 22211822412.

The previous prime is 22212129997. The next prime is 22212130093. The reversal of 22212130021 is 12003121222.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22212130021 - 2⁹ = 22212129509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22212129977 and 22212130004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212130121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19906 + ... + 211708.

It is an arithmetic number, because the mean of its divisors is an integer number (5553109408).

Almost surely, 2^22212130021 is an apocalyptic number.

It is an amenable number.

22212130021 is a deficient number, since it is larger than the sum of its proper divisors (307611).

22212130021 is a wasteful number, since it uses less digits than its factorization.

22212130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307610.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22212130021 its reverse (12003121222), we get a palindrome (34215251243).

The spelling of 22212130021 in words is "twenty-two billion, two hundred twelve million, one hundred thirty thousand, twenty-one".