22132021 has 4 divisors (see below), whose sum is σ = 22507200. Its totient is φ = 21756844.

The previous prime is 22131983. The next prime is 22132027. The reversal of 22132021 is 12023122.

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: 12023122 = 2 ⋅6011561.

It is a cyclic number.

It is not a de Polignac number, because 22132021 - 2⁹ = 22131509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22131992 and 22132010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22132027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187501 + ... + 187618.

It is an arithmetic number, because the mean of its divisors is an integer number (5626800).

Almost surely, 2^22132021 is an apocalyptic number.

It is an amenable number.

22132021 is a deficient number, since it is larger than the sum of its proper divisors (375179).

22132021 is an equidigital number, since it uses as much as digits as its factorization.

22132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375178.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22132021 is about 4704.4681952374. The cubic root of 22132021 is about 280.7633126380.

Adding to 22132021 its reverse (12023122), we get a palindrome (34155143).

The spelling of 22132021 in words is "twenty-two million, one hundred thirty-two thousand, twenty-one".