12011201233138 has 4 divisors (see below), whose sum is σ = 18016801849710. Its totient is φ = 6005600616568.

The previous prime is 12011201233123. The next prime is 12011201233139. The reversal of 12011201233138 is 83133210211021.

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., 11101670894889 + 909530338249 = 3331917^2 + 953693^2 .

It is not an unprimeable number, because it can be changed into a prime (12011201233139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3002800308283 + ... + 3002800308286.

Almost surely, 2^{12011201233138} is an apocalyptic number.

12011201233138 is a deficient number, since it is larger than the sum of its proper divisors (6005600616572).

12011201233138 is an equidigital number, since it uses as much as digits as its factorization.

12011201233138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6005600616571.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 12011201233138 its reverse (83133210211021), we get a palindrome (95144411444159).

The spelling of 12011201233138 in words is "twelve trillion, eleven billion, two hundred one million, two hundred thirty-three thousand, one hundred thirty-eight".