22042021 has 8 divisors (see below), whose sum is σ = 22451904. Its totient is φ = 21635040.

The previous prime is 22042019. The next prime is 22042037. The reversal of 22042021 is 12024022.

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 22042021 - 2¹ = 22042019 is a prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 22041992 and 22042010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22042091) 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, 19545 + ... + 20641.

It is an arithmetic number, because the mean of its divisors is an integer number (2806488).

Almost surely, 2^22042021 is an apocalyptic number.

It is an amenable number.

22042021 is a deficient number, since it is larger than the sum of its proper divisors (409883).

22042021 is a wasteful number, since it uses less digits than its factorization.

22042021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22042021 is about 4694.8930765247. The cubic root of 22042021 is about 280.3822203510.

Adding to 22042021 its reverse (12024022), we get a palindrome (34066043).

It can be divided in two parts, 2204 and 2021, that added together give a square (4225 = 65²).

The spelling of 22042021 in words is "twenty-two million, forty-two thousand, twenty-one".