12013121111 has 16 divisors (see below), whose sum is σ = 12766504608. Its totient is φ = 11265024000.

The previous prime is 12013121101. The next prime is 12013121123. The reversal of 12013121111 is 11112131021.

12013121111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12013121111 - 2⁶ = 12013121047 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 (12013121101) 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 15 ways as a sum of consecutive naturals, for example, 7502711 + ... + 7504311.

It is an arithmetic number, because the mean of its divisors is an integer number (797906538).

Almost surely, 2^12013121111 is an apocalyptic number.

12013121111 is a deficient number, since it is larger than the sum of its proper divisors (753383497).

12013121111 is a wasteful number, since it uses less digits than its factorization.

12013121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 12013121111 its reverse (11112131021), we get a palindrome (23125252132).

The spelling of 12013121111 in words is "twelve billion, thirteen million, one hundred twenty-one thousand, one hundred eleven".