12120011121111 has 32 divisors (see below), whose sum is σ = 16991676979200. Its totient is φ = 7675216352640.

The previous prime is 12120011121109. The next prime is 12120011121137. The reversal of 12120011121111 is 11112111002121.

It is not a de Polignac number, because 12120011121111 - 2¹ = 12120011121109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120011121161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4502356 + ... + 6671673.

It is an arithmetic number, because the mean of its divisors is an integer number (530989905600).

Almost surely, 2^{12120011121111} is an apocalyptic number.

12120011121111 is a deficient number, since it is larger than the sum of its proper divisors (4871665858089).

12120011121111 is a wasteful number, since it uses less digits than its factorization.

12120011121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11174279.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12120011121111 its reverse (11112111002121), we get a palindrome (23232122123232).

The spelling of 12120011121111 in words is "twelve trillion, one hundred twenty billion, eleven million, one hundred twenty-one thousand, one hundred eleven".