12881121 has 16 divisors (see below), whose sum is σ = 19839168. Its totient is φ = 7347200.

The previous prime is 12881119. The next prime is 12881131. The reversal of 12881121 is 12118821.

It is a cyclic number.

It is not a de Polignac number, because 12881121 - 2¹ = 12881119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12881091 and 12881100.

It is not an unprimeable number, because it can be changed into a prime (12881131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10920 + ... + 12041.

It is an arithmetic number, because the mean of its divisors is an integer number (1239948).

Almost surely, 2^12881121 is an apocalyptic number.

12881121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12881121 is a deficient number, since it is larger than the sum of its proper divisors (6958047).

12881121 is a wasteful number, since it uses less digits than its factorization.

12881121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22992.

The product of its digits is 256, while the sum is 24.

The square root of 12881121 is about 3589.0278628063. The cubic root of 12881121 is about 234.4145438700.

Adding to 12881121 its reverse (12118821), we get a palindrome (24999942).

The spelling of 12881121 in words is "twelve million, eight hundred eighty-one thousand, one hundred twenty-one".