12011011211021 has 4 divisors (see below), whose sum is σ = 12016782962844. Its totient is φ = 12005239459200.

The previous prime is 12011011210981. The next prime is 12011011211033. The reversal of 12011011211021 is 12011211011021.

12011011211021 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5048959566121 + 6962051644900 = 2246989^2 + 2638570^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011011211021 - 2¹⁰ = 12011011209997 is a prime.

It is a super-2 number, since 2×12011011211021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011011210987 and 12011011211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011011219021) 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, 2885872790 + ... + 2885876951.

It is an arithmetic number, because the mean of its divisors is an integer number (3004195740711).

Almost surely, 2^{12011011211021} is an apocalyptic number.

It is an amenable number.

12011011211021 is a deficient number, since it is larger than the sum of its proper divisors (5771751823).

12011011211021 is an equidigital number, since it uses as much as digits as its factorization.

12011011211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771751822.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12011011211021 its reverse (12011211011021), we get a palindrome (24022222222042).

The spelling of 12011011211021 in words is "twelve trillion, eleven billion, eleven million, two hundred eleven thousand, twenty-one".