20112111223 has 2 divisors, whose sum is σ = 20112111224. Its totient is φ = 20112111222.

The previous prime is 20112111221. The next prime is 20112111247. The reversal of 20112111223 is 32211121102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20112111223 - 2¹ = 20112111221 is a prime.

Together with 20112111221, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20112111197 and 20112111206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112111221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056055611 + 10056055612.

It is an arithmetic number, because the mean of its divisors is an integer number (10056055612).

Almost surely, 2^20112111223 is an apocalyptic number.

20112111223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112111223 is an equidigital number, since it uses as much as digits as its factorization.

20112111223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20112111223 its reverse (32211121102), we get a palindrome (52323232325).

The spelling of 20112111223 in words is "twenty billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty-three".