20212210111 has 4 divisors (see below), whose sum is σ = 20214770400. Its totient is φ = 20209649824.

The previous prime is 20212210103. The next prime is 20212210121. The reversal of 20212210111 is 11101221202.

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 20212210111 - 2³ = 20212210103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212210091 and 20212210100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212210121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1268266 + ... + 1284103.

It is an arithmetic number, because the mean of its divisors is an integer number (5053692600).

Almost surely, 2^20212210111 is an apocalyptic number.

20212210111 is a deficient number, since it is larger than the sum of its proper divisors (2560289).

20212210111 is an equidigital number, since it uses as much as digits as its factorization.

20212210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560288.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20212210111 its reverse (11101221202), we get a palindrome (31313431313).

The spelling of 20212210111 in words is "twenty billion, two hundred twelve million, two hundred ten thousand, one hundred eleven".