12081408121 has 8 divisors (see below), whose sum is σ = 12136802184. Its totient is φ = 12026044800.

The previous prime is 12081408107. The next prime is 12081408127. The reversal of 12081408121 is 12180418021.

It can be written as a sum of positive squares in 4 ways, for example, as 5298238521 + 6783169600 = 72789^2 + 82360^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12081408121 - 2¹⁵ = 12081375353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12081408121.

It is not an unprimeable number, because it can be changed into a prime (12081408127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215271 + ... + 1225171.

It is an arithmetic number, because the mean of its divisors is an integer number (1517100273).

Almost surely, 2^12081408121 is an apocalyptic number.

It is an amenable number.

12081408121 is a deficient number, since it is larger than the sum of its proper divisors (55394063).

12081408121 is an equidigital number, since it uses as much as digits as its factorization.

12081408121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15371.

The product of its (nonzero) digits is 1024, while the sum is 28.

The spelling of 12081408121 in words is "twelve billion, eighty-one million, four hundred eight thousand, one hundred twenty-one".