20232123111 has 16 divisors (see below), whose sum is σ = 30043077120. Its totient is φ = 13456779480.

The previous prime is 20232123103. The next prime is 20232123127. The reversal of 20232123111 is 11132123202.

It is not a de Polignac number, because 20232123111 - 2³ = 20232123103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20232123101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 857665 + ... + 880938.

It is an arithmetic number, because the mean of its divisors is an integer number (1877692320).

Almost surely, 2^20232123111 is an apocalyptic number.

20232123111 is a deficient number, since it is larger than the sum of its proper divisors (9810954009).

20232123111 is a wasteful number, since it uses less digits than its factorization.

20232123111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739043 (or 1739037 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20232123111 its reverse (11132123202), we get a palindrome (31364246313).

Subtracting from 20232123111 its reverse (11132123202), we obtain a palindrome (9099999909).

The spelling of 20232123111 in words is "twenty billion, two hundred thirty-two million, one hundred twenty-three thousand, one hundred eleven".