12011230203178 has 4 divisors (see below), whose sum is σ = 18016845304770. Its totient is φ = 6005615101588.

The previous prime is 12011230203169. The next prime is 12011230203179. The reversal of 12011230203178 is 87130203211021.

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., 9900128723809 + 2111101479369 = 3146447^2 + 1452963^2 .

It is a super-2 number, since 2×12011230203178² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12011230203179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3002807550793 + ... + 3002807550796.

Almost surely, 2^{12011230203178} is an apocalyptic number.

12011230203178 is a deficient number, since it is larger than the sum of its proper divisors (6005615101592).

12011230203178 is an equidigital number, since it uses as much as digits as its factorization.

12011230203178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6005615101591.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 12011230203178 its reverse (87130203211021), we get a palindrome (99141433414199).

The spelling of 12011230203178 in words is "twelve trillion, eleven billion, two hundred thirty million, two hundred three thousand, one hundred seventy-eight".