22021071 has 4 divisors (see below), whose sum is σ = 29361432. Its totient is φ = 14680712.

The previous prime is 22021049. The next prime is 22021093. The reversal of 22021071 is 17012022.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22021049) and next prime (22021093).

It is a cyclic number.

It is not a de Polignac number, because 22021071 - 2⁶ = 22021007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22021071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021271) 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 3 ways as a sum of consecutive naturals, for example, 3670176 + ... + 3670181.

It is an arithmetic number, because the mean of its divisors is an integer number (7340358).

Almost surely, 2^22021071 is an apocalyptic number.

22021071 is a deficient number, since it is larger than the sum of its proper divisors (7340361).

22021071 is an equidigital number, since it uses as much as digits as its factorization.

22021071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7340360.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 22021071 is about 4692.6613983964. The cubic root of 22021071 is about 280.2933617492.

Adding to 22021071 its reverse (17012022), we get a palindrome (39033093).

The spelling of 22021071 in words is "twenty-two million, twenty-one thousand, seventy-one".