22021201 has 4 divisors (see below), whose sum is σ = 22035312. Its totient is φ = 22007092.

The previous prime is 22021177. The next prime is 22021211. The reversal of 22021201 is 10212022.

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 an emirpimes, since its reverse is a distinct semiprime: 10212022 = 2 ⋅5106011.

It is a cyclic number.

It is not a de Polignac number, because 22021201 - 2¹⁷ = 21890129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4375 + ... + 7948.

It is an arithmetic number, because the mean of its divisors is an integer number (5508828).

Almost surely, 2^22021201 is an apocalyptic number.

It is an amenable number.

22021201 is a deficient number, since it is larger than the sum of its proper divisors (14111).

22021201 is a wasteful number, since it uses less digits than its factorization.

22021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14110.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 22021201 is about 4692.6752497909. The cubic root of 22021201 is about 280.2939133128.

Adding to 22021201 its reverse (10212022), we get a palindrome (32233223).

It can be divided in two parts, 22021 and 201, that added together give a palindrome (22222).

The spelling of 22021201 in words is "twenty-two million, twenty-one thousand, two hundred one".