12111011011001 has 32 divisors (see below), whose sum is σ = 14140890586368. Its totient is φ = 10157159151360.

The previous prime is 12111011010971. The next prime is 12111011011007. The reversal of 12111011011001 is 10011011011121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12111011011001 - 2¹⁸ = 12111010748857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12111011011007) 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 in 31 ways as a sum of consecutive naturals, for example, 367641191 + ... + 367674131.

It is an arithmetic number, because the mean of its divisors is an integer number (441902830824).

Almost surely, 2^{12111011011001} is an apocalyptic number.

It is an amenable number.

12111011011001 is a deficient number, since it is larger than the sum of its proper divisors (2029879575367).

12111011011001 is a wasteful number, since it uses less digits than its factorization.

12111011011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35681.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 12111011011001 its reverse (10011011011121), we get a palindrome (22122022022122).

The spelling of 12111011011001 in words is "twelve trillion, one hundred eleven billion, eleven million, eleven thousand, one".