22020021121 has 4 divisors (see below), whose sum is σ = 25165738432. Its totient is φ = 18874303812.

The previous prime is 22020021109. The next prime is 22020021131. The reversal of 22020021121 is 12112002022.

It is a happy number.

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.

It is not a de Polignac number, because 22020021121 - 2⁷ = 22020020993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22020021131) 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 in 3 ways as a sum of consecutive naturals, for example, 1572858645 + ... + 1572858658.

It is an arithmetic number, because the mean of its divisors is an integer number (6291434608).

Almost surely, 2^22020021121 is an apocalyptic number.

It is an amenable number.

22020021121 is a deficient number, since it is larger than the sum of its proper divisors (3145717311).

22020021121 is an equidigital number, since it uses as much as digits as its factorization.

22020021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145717310.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22020021121 its reverse (12112002022), we get a palindrome (34132023143).

The spelling of 22020021121 in words is "twenty-two billion, twenty million, twenty-one thousand, one hundred twenty-one".