12118881121 has 2 divisors, whose sum is σ = 12118881122. Its totient is φ = 12118881120.

The previous prime is 12118881113. The next prime is 12118881127.

12118881121 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7445791521 + 4673089600 = 86289^2 + 68360^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 12118881121 - 2³ = 12118881113 is a prime.

It is not a weakly prime, because it can be changed into another prime (12118881127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6059440560 + 6059440561.

It is an arithmetic number, because the mean of its divisors is an integer number (6059440561).

Almost surely, 2^12118881121 is an apocalyptic number.

It is an amenable number.

12118881121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12118881121 is an equidigital number, since it uses as much as digits as its factorization.

12118881121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2048, while the sum is 34.

The spelling of 12118881121 in words is "twelve billion, one hundred eighteen million, eight hundred eighty-one thousand, one hundred twenty-one".