12081203261421 has 32 divisors (see below), whose sum is σ = 19031477203200. Its totient is φ = 6673375019520.

The previous prime is 12081203261417. The next prime is 12081203261459. The reversal of 12081203261421 is 12416230218021.

It is not a de Polignac number, because 12081203261421 - 2² = 12081203261417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12081203262421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64271266 + ... + 64458963.

It is an arithmetic number, because the mean of its divisors is an integer number (594733662600).

Almost surely, 2^{12081203261421} is an apocalyptic number.

It is an amenable number.

12081203261421 is a deficient number, since it is larger than the sum of its proper divisors (6950273941779).

12081203261421 is a wasteful number, since it uses less digits than its factorization.

12081203261421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128730389.

The product of its (nonzero) digits is 9216, while the sum is 33.

Adding to 12081203261421 its reverse (12416230218021), we get a palindrome (24497433479442).

The spelling of 12081203261421 in words is "twelve trillion, eighty-one billion, two hundred three million, two hundred sixty-one thousand, four hundred twenty-one".