12111021220211 has 4 divisors (see below), whose sum is σ = 12181027123392. Its totient is φ = 12041015317032.

The previous prime is 12111021220189. The next prime is 12111021220237. The reversal of 12111021220211 is 11202212011121.

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

It is a cyclic number.

It is not a de Polignac number, because 12111021220211 - 2⁴² = 7712974709107 is a prime.

It is a super-2 number, since 2×12111021220211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12111021220211.

It is not an unprimeable number, because it can be changed into a prime (12111021223211) 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, 35002951331 + ... + 35002951676.

It is an arithmetic number, because the mean of its divisors is an integer number (3045256780848).

Almost surely, 2^{12111021220211} is an apocalyptic number.

12111021220211 is a deficient number, since it is larger than the sum of its proper divisors (70005903181).

12111021220211 is an equidigital number, since it uses as much as digits as its factorization.

12111021220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70005903180.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12111021220211 its reverse (11202212011121), we get a palindrome (23313233231332).

The spelling of 12111021220211 in words is "twelve trillion, one hundred eleven billion, twenty-one million, two hundred twenty thousand, two hundred eleven".