20231233111 has 2 divisors, whose sum is σ = 20231233112. Its totient is φ = 20231233110.

The previous prime is 20231233109. The next prime is 20231233123. The reversal of 20231233111 is 11133213202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20231233111 - 2¹ = 20231233109 is a prime.

Together with 20231233109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20231233411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115616555 + 10115616556.

It is an arithmetic number, because the mean of its divisors is an integer number (10115616556).

Almost surely, 2^20231233111 is an apocalyptic number.

20231233111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20231233111 is an equidigital number, since it uses as much as digits as its factorization.

20231233111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20231233111 its reverse (11133213202), we get a palindrome (31364446313).

The spelling of 20231233111 in words is "twenty billion, two hundred thirty-one million, two hundred thirty-three thousand, one hundred eleven".