20221211111 has 32 divisors (see below), whose sum is σ = 22174326720. Its totient is φ = 18375552000.

The previous prime is 20221211083. The next prime is 20221211113. The reversal of 20221211111 is 11111212202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221211111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221211113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12351785 + ... + 12353421.

It is an arithmetic number, because the mean of its divisors is an integer number (692947710).

Almost surely, 2^20221211111 is an apocalyptic number.

20221211111 is a deficient number, since it is larger than the sum of its proper divisors (1953115609).

20221211111 is a wasteful number, since it uses less digits than its factorization.

20221211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20221211111 its reverse (11111212202), we get a palindrome (31332423313).

The spelling of 20221211111 in words is "twenty billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".