12212881 has 2 divisors, whose sum is σ = 12212882. Its totient is φ = 12212880.

The previous prime is 12212867. The next prime is 12212887. The reversal of 12212881 is 18821221.

12212881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6548481 + 5664400 = 2559^2 + 2380^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212881 - 2¹⁷ = 12081809 is a prime.

It is a super-2 number, since 2×12212881² = 298308924640322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12212887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106440 + 6106441.

It is an arithmetic number, because the mean of its divisors is an integer number (6106441).

Almost surely, 2^12212881 is an apocalyptic number.

It is an amenable number.

12212881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212881 is an equidigital number, since it uses as much as digits as its factorization.

12212881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 25.

The square root of 12212881 is about 3494.6932626484. The cubic root of 12212881 is about 230.2887425901.

The spelling of 12212881 in words is "twelve million, two hundred twelve thousand, eight hundred eighty-one".