20112111203 has 4 divisors (see below), whose sum is σ = 20112477840. Its totient is φ = 20111744568.

The previous prime is 20112111199. The next prime is 20112111209. The reversal of 20112111203 is 30211121102.

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 20112111203 - 2² = 20112111199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112111209) 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 3 ways as a sum of consecutive naturals, for example, 82583 + ... + 216896.

It is an arithmetic number, because the mean of its divisors is an integer number (5028119460).

Almost surely, 2^20112111203 is an apocalyptic number.

20112111203 is a deficient number, since it is larger than the sum of its proper divisors (366637).

20112111203 is an equidigital number, since it uses as much as digits as its factorization.

20112111203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366636.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20112111203 its reverse (30211121102), we get a palindrome (50323232305).

The spelling of 20112111203 in words is "twenty billion, one hundred twelve million, one hundred eleven thousand, two hundred three".