12220021211 has 4 divisors (see below), whose sum is σ = 12225873000. Its totient is φ = 12214169424.

The previous prime is 12220021207. The next prime is 12220021241. The reversal of 12220021211 is 11212002221.

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 12220021211 - 2² = 12220021207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12220021241) 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, 2922761 + ... + 2926938.

It is an arithmetic number, because the mean of its divisors is an integer number (3056468250).

Almost surely, 2^12220021211 is an apocalyptic number.

12220021211 is a deficient number, since it is larger than the sum of its proper divisors (5851789).

12220021211 is an equidigital number, since it uses as much as digits as its factorization.

12220021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5851788.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12220021211 its reverse (11212002221), we get a palindrome (23432023432).

The spelling of 12220021211 in words is "twelve billion, two hundred twenty million, twenty-one thousand, two hundred eleven".