12011001021011 has 4 divisors (see below), whose sum is σ = 12266554234272. Its totient is φ = 11755447807752.

The previous prime is 12011001020999. The next prime is 12011001021049. The reversal of 12011001021011 is 11012010011021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011001021011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011001020983 and 12011001021001.

It is not an unprimeable number, because it can be changed into a prime (12011001021211) 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, 127776606560 + ... + 127776606653.

It is an arithmetic number, because the mean of its divisors is an integer number (3066638558568).

Almost surely, 2^{12011001021011} is an apocalyptic number.

12011001021011 is a deficient number, since it is larger than the sum of its proper divisors (255553213261).

12011001021011 is an equidigital number, since it uses as much as digits as its factorization.

12011001021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255553213260.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12011001021011 its reverse (11012010011021), we get a palindrome (23023011032032).

It can be divided in two parts, 120110010 and 21011, that added together give a palindrome (120131021).

The spelling of 12011001021011 in words is "twelve trillion, eleven billion, one million, twenty-one thousand, eleven".