22122021 has 8 divisors (see below), whose sum is σ = 30778560. Its totient is φ = 14106752.

The previous prime is 22122017. The next prime is 22122043. The reversal of 22122021 is 12022122.

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 22122021 - 2² = 22122017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22121988 and 22122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160236 + ... + 160373.

It is an arithmetic number, because the mean of its divisors is an integer number (3847320).

Almost surely, 2^22122021 is an apocalyptic number.

It is an amenable number.

22122021 is a deficient number, since it is larger than the sum of its proper divisors (8656539).

22122021 is a wasteful number, since it uses less digits than its factorization.

22122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320635.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22122021 is about 4703.4052557695. The cubic root of 22122021 is about 280.7210201290.

Adding to 22122021 its reverse (12022122), we get a palindrome (34144143).

The spelling of 22122021 in words is "twenty-two million, one hundred twenty-two thousand, twenty-one".