12888121 has 2 divisors, whose sum is σ = 12888122. Its totient is φ = 12888120.

The previous prime is 12888079. The next prime is 12888131. The reversal of 12888121 is 12188821.

It is a happy number.

12888121 is digitally balanced in base 3, 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., 9517225 + 3370896 = 3085^2 + 1836^2 .

It is a cyclic number.

It is not a de Polignac number, because 12888121 - 2⁷ = 12887993 is a prime.

It is a super-2 number, since 2×12888121² = 332207325821282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12888131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6444060 + 6444061.

It is an arithmetic number, because the mean of its divisors is an integer number (6444061).

Almost surely, 2^12888121 is an apocalyptic number.

It is an amenable number.

12888121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12888121 is an equidigital number, since it uses as much as digits as its factorization.

12888121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2048, while the sum is 31.

The square root of 12888121 is about 3590.0029247899. The cubic root of 12888121 is about 234.4569988876.

It can be divided in two parts, 1288 and 8121, that added together give a square (9409 = 97²).

The spelling of 12888121 in words is "twelve million, eight hundred eighty-eight thousand, one hundred twenty-one".