12011111111021 has 4 divisors (see below), whose sum is σ = 13103030302944. Its totient is φ = 10919191919100.

The previous prime is 12011111110987. The next prime is 12011111111047.

12011111111021 is nontrivially palindromic in base 10.

12011111111021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12011111111021 - 2³⁴ = 11993931241837 is a prime.

It is a super-3 number, since 3×12011111111021³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011111110987 and 12011111111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011111111081) 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, 545959595945 + ... + 545959595966.

It is an arithmetic number, because the mean of its divisors is an integer number (3275757575736).

Almost surely, 2^{12011111111021} is an apocalyptic number.

12011111111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12011111111021 is a deficient number, since it is larger than the sum of its proper divisors (1091919191923).

12011111111021 is a wasteful number, since it uses less digits than its factorization.

12011111111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091919191922.

The product of its (nonzero) digits is 4, while the sum is 14.

It can be divided in two parts, 1201111 and 1111021, that multiplied together give a palindrome (1334459544331).

The spelling of 12011111111021 in words is "twelve trillion, eleven billion, one hundred eleven million, one hundred eleven thousand, twenty-one".