12111222601 has 3 divisors (see below), whose sum is σ = 12111332653. Its totient is φ = 12111112550.

The previous prime is 12111222533. The next prime is 12111222647. The reversal of 12111222601 is 10622211121.

The square root of 12111222601 is 110051.

It is a perfect power (a square), and thus also a powerful number.

12111222601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10622211121 = 271 ⋅39196351.

It is not a de Polignac number, because 12111222601 - 2⁹ = 12111222089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111222661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 55026 + ... + 165076.

Almost surely, 2^12111222601 is an apocalyptic number.

12111222601 is the 110051-st square number.

12111222601 is the 55026-th centered octagonal number.

It is an amenable number.

12111222601 is a deficient number, since it is larger than the sum of its proper divisors (110052).

12111222601 is an frugal number, since it uses more digits than its factorization.

12111222601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220102 (or 110051 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12111222601 its reverse (10622211121), we get a palindrome (22733433722).

The spelling of 12111222601 in words is "twelve billion, one hundred eleven million, two hundred twenty-two thousand, six hundred one".