22212022021 has 8 divisors (see below), whose sum is σ = 25516698944. Its totient is φ = 18940227840.

The previous prime is 22212021989. The next prime is 22212022033. The reversal of 22212022021 is 12022021222.

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 22212022021 - 2⁵ = 22212021989 is a prime.

It is a super-2 number, since 2×22212022021² (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 = 22212021986 and 22212022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212022421) 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, 8219235 + ... + 8221936.

It is an arithmetic number, because the mean of its divisors is an integer number (3189587368).

Almost surely, 2^22212022021 is an apocalyptic number.

It is an amenable number.

22212022021 is a deficient number, since it is larger than the sum of its proper divisors (3304676923).

22212022021 is a wasteful number, since it uses less digits than its factorization.

22212022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16441371.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22212022021 its reverse (12022021222), we get a palindrome (34234043243).

It can be divided in two parts, 222 and 12022021, that multiplied together give a palindrome (2668888662).

The spelling of 22212022021 in words is "twenty-two billion, two hundred twelve million, twenty-two thousand, twenty-one".