12022281 has 12 divisors (see below), whose sum is σ = 18387252. Its totient is φ = 7543296.

The previous prime is 12022267. The next prime is 12022291. The reversal of 12022281 is 18222021.

It is a happy number.

12022281 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10017225 + 2005056 = 3165^2 + 1416^2 .

It is not a de Polignac number, because 12022281 - 2²³ = 3633673 is a prime.

It is a super-2 number, since 2×12022281² = 289070480885922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12022291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39136 + ... + 39441.

It is an arithmetic number, because the mean of its divisors is an integer number (1532271).

Almost surely, 2^12022281 is an apocalyptic number.

It is an amenable number.

12022281 is a deficient number, since it is larger than the sum of its proper divisors (6364971).

12022281 is a wasteful number, since it uses less digits than its factorization.

12022281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78600 (or 78597 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 12022281 is about 3467.3161090388. The cubic root of 12022281 is about 229.0844574473.

The spelling of 12022281 in words is "twelve million, twenty-two thousand, two hundred eighty-one".