22727121 has 16 divisors (see below), whose sum is σ = 30932928. Its totient is φ = 14840000.

The previous prime is 22727099. The next prime is 22727141. The reversal of 22727121 is 12172722.

It is a cyclic number.

It is not a de Polignac number, because 22727121 - 2⁷ = 22726993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22727091 and 22727100.

It is not an unprimeable number, because it can be changed into a prime (22727141) 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 15 ways as a sum of consecutive naturals, for example, 32071 + ... + 32771.

It is an arithmetic number, because the mean of its divisors is an integer number (1933308).

Almost surely, 2^22727121 is an apocalyptic number.

It is an amenable number.

22727121 is a deficient number, since it is larger than the sum of its proper divisors (8205807).

22727121 is a wasteful number, since it uses less digits than its factorization.

22727121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912.

The product of its digits is 784, while the sum is 24.

The square root of 22727121 is about 4767.2970329108. The cubic root of 22727121 is about 283.2575371261.

Adding to 22727121 its reverse (12172722), we get a palindrome (34899843).

The spelling of 22727121 in words is "twenty-two million, seven hundred twenty-seven thousand, one hundred twenty-one".