12000281978522 has 4 divisors (see below), whose sum is σ = 18000422967786. Its totient is φ = 6000140989260.

The previous prime is 12000281978437. The next prime is 12000281978527. The reversal of 12000281978522 is 22587918200021.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 8855153529121 + 3145128449401 = 2975761^2 + 1773451^2 .

It is not an unprimeable number, because it can be changed into a prime (12000281978527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3000070494629 + ... + 3000070494632.

Almost surely, 2^{12000281978522} is an apocalyptic number.

12000281978522 is a deficient number, since it is larger than the sum of its proper divisors (6000140989264).

12000281978522 is an equidigital number, since it uses as much as digits as its factorization.

12000281978522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000140989263.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 12000281978522 in words is "twelve trillion, two hundred eighty-one million, nine hundred seventy-eight thousand, five hundred twenty-two".