12021111312211 has 4 divisors (see below), whose sum is σ = 12021128293752. Its totient is φ = 12021094330672.

The previous prime is 12021111312193. The next prime is 12021111312227. The reversal of 12021111312211 is 11221311112021.

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-12021111312211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021111312251) 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, 7380541 + ... + 8860846.

It is an arithmetic number, because the mean of its divisors is an integer number (3005282073438).

Almost surely, 2^{12021111312211} is an apocalyptic number.

12021111312211 is a deficient number, since it is larger than the sum of its proper divisors (16981541).

12021111312211 is an equidigital number, since it uses as much as digits as its factorization.

12021111312211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16981540.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 12021111312211 its reverse (11221311112021), we get a palindrome (23242422424232).

The spelling of 12021111312211 in words is "twelve trillion, twenty-one billion, one hundred eleven million, three hundred twelve thousand, two hundred eleven".