20111023223 has 2 divisors, whose sum is σ = 20111023224. Its totient is φ = 20111023222.

The previous prime is 20111023181. The next prime is 20111023301. The reversal of 20111023223 is 32232011102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20111023223 - 2¹⁰ = 20111022199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111022223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055511611 + 10055511612.

It is an arithmetic number, because the mean of its divisors is an integer number (10055511612).

Almost surely, 2^20111023223 is an apocalyptic number.

20111023223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111023223 is an equidigital number, since it uses as much as digits as its factorization.

20111023223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20111023223 its reverse (32232011102), we get a palindrome (52343034325).

The spelling of 20111023223 in words is "twenty billion, one hundred eleven million, twenty-three thousand, two hundred twenty-three".