12116450021 has 4 divisors (see below), whose sum is σ = 13048484652. Its totient is φ = 11184415392.

The previous prime is 12116449997. The next prime is 12116450033. The reversal of 12116450021 is 12005461121.

12116450021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 978813796 + 11137636225 = 31286^2 + 105535^2 .

It is a cyclic number.

It is not a de Polignac number, because 12116450021 - 2¹⁸ = 12116187877 is a prime.

It is a super-2 number, since 2×12116450021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12116410021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466017296 + ... + 466017321.

It is an arithmetic number, because the mean of its divisors is an integer number (3262121163).

Almost surely, 2^12116450021 is an apocalyptic number.

It is an amenable number.

12116450021 is a deficient number, since it is larger than the sum of its proper divisors (932034631).

12116450021 is an equidigital number, since it uses as much as digits as its factorization.

12116450021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932034630.

The product of its (nonzero) digits is 480, while the sum is 23.

The spelling of 12116450021 in words is "twelve billion, one hundred sixteen million, four hundred fifty thousand, twenty-one".