12220111311 has 4 divisors (see below), whose sum is σ = 16293481752. Its totient is φ = 8146740872.

The previous prime is 12220111279. The next prime is 12220111339. The reversal of 12220111311 is 11311102221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11311102221 = 3 ⋅3770367407.

It is a cyclic number.

It is not a de Polignac number, because 12220111311 - 2⁵ = 12220111279 is a prime.

It is a super-2 number, since 2×12220111311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220111381) 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, 2036685216 + ... + 2036685221.

It is an arithmetic number, because the mean of its divisors is an integer number (4073370438).

Almost surely, 2^12220111311 is an apocalyptic number.

12220111311 is a deficient number, since it is larger than the sum of its proper divisors (4073370441).

12220111311 is an equidigital number, since it uses as much as digits as its factorization.

12220111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073370440.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12220111311 its reverse (11311102221), we get a palindrome (23531213532).

The spelling of 12220111311 in words is "twelve billion, two hundred twenty million, one hundred eleven thousand, three hundred eleven".