12001011023111 has 4 divisors (see below), whose sum is σ = 13092012025224. Its totient is φ = 10910010021000.

The previous prime is 12001011023047. The next prime is 12001011023129. The reversal of 12001011023111 is 11132011010021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12001011023111 - 2⁶ = 12001011023047 is a prime.

It is a super-2 number, since 2×12001011023111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001011020111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545500501040 + ... + 545500501061.

It is an arithmetic number, because the mean of its divisors is an integer number (3273003006306).

Almost surely, 2^{12001011023111} is an apocalyptic number.

12001011023111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12001011023111 is a deficient number, since it is larger than the sum of its proper divisors (1091001002113).

12001011023111 is a wasteful number, since it uses less digits than its factorization.

12001011023111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091001002112.

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

Adding to 12001011023111 its reverse (11132011010021), we get a palindrome (23133022033132).

The spelling of 12001011023111 in words is "twelve trillion, one billion, eleven million, twenty-three thousand, one hundred eleven".