22971121 has 2 divisors, whose sum is σ = 22971122. Its totient is φ = 22971120.

The previous prime is 22971107. The next prime is 22971149. The reversal of 22971121 is 12117922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17514225 + 5456896 = 4185^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 22971121 - 2⁷ = 22970993 is a prime.

It is not a weakly prime, because it can be changed into another prime (22971721) 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 as a sum of consecutive naturals, namely, 11485560 + 11485561.

It is an arithmetic number, because the mean of its divisors is an integer number (11485561).

Almost surely, 2^22971121 is an apocalyptic number.

It is an amenable number.

22971121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22971121 is an equidigital number, since it uses as much as digits as its factorization.

22971121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 22971121 is about 4792.8197337267. The cubic root of 22971121 is about 284.2676219967.

The spelling of 22971121 in words is "twenty-two million, nine hundred seventy-one thousand, one hundred twenty-one".