12801121 has 2 divisors, whose sum is σ = 12801122. Its totient is φ = 12801120.

The previous prime is 12801101. The next prime is 12801127. The reversal of 12801121 is 12110821.

12801121 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., 8643600 + 4157521 = 2940^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 12801121 - 2¹³ = 12792929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12801095 and 12801104.

It is not a weakly prime, because it can be changed into another prime (12801127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6400560 + 6400561.

It is an arithmetic number, because the mean of its divisors is an integer number (6400561).

Almost surely, 2^12801121 is an apocalyptic number.

It is an amenable number.

12801121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12801121 is an equidigital number, since it uses as much as digits as its factorization.

12801121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 12801121 is about 3577.8654250824. The cubic root of 12801121 is about 233.9282476574.

Adding to 12801121 its reverse (12110821), we get a palindrome (24911942).

It can be divided in two parts, 1280 and 1121, that added together give a 4-th power (2401 = 7⁴).

The spelling of 12801121 in words is "twelve million, eight hundred one thousand, one hundred twenty-one".