12011020111011 has 4 divisors (see below), whose sum is σ = 16014693481352. Its totient is φ = 8007346740672.

The previous prime is 12011020110989. The next prime is 12011020111043. The reversal of 12011020111011 is 11011102011021.

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

It is not a de Polignac number, because 12011020111011 - 2¹¹ = 12011020108963 is a prime.

It is a super-2 number, since 2×12011020111011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011020111511) 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, 2001836685166 + ... + 2001836685171.

It is an arithmetic number, because the mean of its divisors is an integer number (4003673370338).

Almost surely, 2^{12011020111011} is an apocalyptic number.

12011020111011 is a deficient number, since it is larger than the sum of its proper divisors (4003673370341).

12011020111011 is an equidigital number, since it uses as much as digits as its factorization.

12011020111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003673370340.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 12011020111011 its reverse (11011102011021), we get a palindrome (23022122122032).

The spelling of 12011020111011 in words is "twelve trillion, eleven billion, twenty million, one hundred eleven thousand, eleven".