20112202111 has 4 divisors (see below), whose sum is σ = 20338182000. Its totient is φ = 19886222224.

The previous prime is 20112202051. The next prime is 20112202129. The reversal of 20112202111 is 11120221102.

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 20112202111 - 2⁷ = 20112201983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112202091 and 20112202100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112202211) 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, 112989811 + ... + 112989988.

It is an arithmetic number, because the mean of its divisors is an integer number (5084545500).

Almost surely, 2^20112202111 is an apocalyptic number.

20112202111 is a deficient number, since it is larger than the sum of its proper divisors (225979889).

20112202111 is an equidigital number, since it uses as much as digits as its factorization.

20112202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225979888.

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

Adding to 20112202111 its reverse (11120221102), we get a palindrome (31232423213).

The spelling of 20112202111 in words is "twenty billion, one hundred twelve million, two hundred two thousand, one hundred eleven".