22071121 has 2 divisors, whose sum is σ = 22071122. Its totient is φ = 22071120.

The previous prime is 22071113. The next prime is 22071157. The reversal of 22071121 is 12117022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13220496 + 8850625 = 3636^2 + 2975^2 .

It is a cyclic number.

It is not a de Polignac number, because 22071121 - 2³ = 22071113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22071095 and 22071104.

It is not a weakly prime, because it can be changed into another prime (22072121) 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 as a sum of consecutive naturals, namely, 11035560 + 11035561.

It is an arithmetic number, because the mean of its divisors is an integer number (11035561).

Almost surely, 2^22071121 is an apocalyptic number.

It is an amenable number.

22071121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22071121 is an equidigital number, since it uses as much as digits as its factorization.

22071121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 22071121 is about 4697.9911664455. The cubic root of 22071121 is about 280.5055534862.

Adding to 22071121 its reverse (12117022), we get a palindrome (34188143).

The spelling of 22071121 in words is "twenty-two million, seventy-one thousand, one hundred twenty-one".