12011221566103 has 16 divisors (see below), whose sum is σ = 12255335104320. Its totient is φ = 11769810624000.

The previous prime is 12011221566101. The next prime is 12011221566131. The reversal of 12011221566103 is 30166512211021.

It is a cyclic number.

It is not a de Polignac number, because 12011221566103 - 2¹ = 12011221566101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011221566101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9079726 + ... + 10318132.

It is an arithmetic number, because the mean of its divisors is an integer number (765958444020).

Almost surely, 2^{12011221566103} is an apocalyptic number.

12011221566103 is a deficient number, since it is larger than the sum of its proper divisors (244113538217).

12011221566103 is a wasteful number, since it uses less digits than its factorization.

12011221566103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239498.

The product of its (nonzero) digits is 4320, while the sum is 31.

Adding to 12011221566103 its reverse (30166512211021), we get a palindrome (42177733777124).

The spelling of 12011221566103 in words is "twelve trillion, eleven billion, two hundred twenty-one million, five hundred sixty-six thousand, one hundred three".