22412021 has 2 divisors, whose sum is σ = 22412022. Its totient is φ = 22412020.

The previous prime is 22412017. The next prime is 22412029. The reversal of 22412021 is 12021422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21031396 + 1380625 = 4586^2 + 1175^2 .

It is a cyclic number.

It is not a de Polignac number, because 22412021 - 2² = 22412017 is a prime.

It is a Chen prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 22411987 and 22412005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22412029) 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 as a sum of consecutive naturals, namely, 11206010 + 11206011.

It is an arithmetic number, because the mean of its divisors is an integer number (11206011).

Almost surely, 2^22412021 is an apocalyptic number.

It is an amenable number.

22412021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22412021 is an equidigital number, since it uses as much as digits as its factorization.

22412021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 22412021 is about 4734.1336060572. The cubic root of 22412021 is about 281.9423662042.

Adding to 22412021 its reverse (12021422), we get a palindrome (34433443).

The spelling of 22412021 in words is "twenty-two million, four hundred twelve thousand, twenty-one".