20112221101 has 4 divisors (see below), whose sum is σ = 22985395552. Its totient is φ = 17239046652.

The previous prime is 20112221099. The next prime is 20112221119. The reversal of 20112221101 is 10112221102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20112221101 - 2¹ = 20112221099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112221141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436587215 + ... + 1436587228.

It is an arithmetic number, because the mean of its divisors is an integer number (5746348888).

Almost surely, 2^20112221101 is an apocalyptic number.

It is an amenable number.

20112221101 is a deficient number, since it is larger than the sum of its proper divisors (2873174451).

20112221101 is an equidigital number, since it uses as much as digits as its factorization.

20112221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873174450.

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

Adding to 20112221101 its reverse (10112221102), we get a palindrome (30224442203).

Subtracting from 20112221101 its reverse (10112221102), we obtain a palindrome (9999999999).

The spelling of 20112221101 in words is "twenty billion, one hundred twelve million, two hundred twenty-one thousand, one hundred one".