22006121 has 2 divisors, whose sum is σ = 22006122. Its totient is φ = 22006120.

The previous prime is 22006111. The next prime is 22006133. The reversal of 22006121 is 12160022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21715600 + 290521 = 4660^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 22006121 - 2⁶ = 22006057 is a prime.

It is a super-2 number, since 2×22006121² = 968538722933282, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22006096 and 22006105.

It is not a weakly prime, because it can be changed into another prime (22006111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11003060 + 11003061.

It is an arithmetic number, because the mean of its divisors is an integer number (11003061).

Almost surely, 2^22006121 is an apocalyptic number.

It is an amenable number.

22006121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22006121 is an equidigital number, since it uses as much as digits as its factorization.

22006121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 22006121 is about 4691.0682152363. The cubic root of 22006121 is about 280.2299174479.

Adding to 22006121 its reverse (12160022), we get a palindrome (34166143).

The spelling of 22006121 in words is "twenty-two million, six thousand, one hundred twenty-one".