22678121 has 2 divisors, whose sum is σ = 22678122. Its totient is φ = 22678120.

The previous prime is 22678109. The next prime is 22678141. The reversal of 22678121 is 12187622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14899600 + 7778521 = 3860^2 + 2789^2 .

It is a cyclic number.

It is not a de Polignac number, because 22678121 - 2⁶ = 22678057 is a prime.

It is not a weakly prime, because it can be changed into another prime (22678141) 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, 11339060 + 11339061.

It is an arithmetic number, because the mean of its divisors is an integer number (11339061).

Almost surely, 2^22678121 is an apocalyptic number.

It is an amenable number.

22678121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22678121 is an equidigital number, since it uses as much as digits as its factorization.

22678121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 29.

The square root of 22678121 is about 4762.1550793732. The cubic root of 22678121 is about 283.0538215423.

The spelling of 22678121 in words is "twenty-two million, six hundred seventy-eight thousand, one hundred twenty-one".