20201233123 has 4 divisors (see below), whose sum is σ = 20693946168. Its totient is φ = 19708520080.

The previous prime is 20201233103. The next prime is 20201233141. The reversal of 20201233123 is 32133210202.

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 20201233123 - 2²⁵ = 20167678691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20201233123.

It is not an unprimeable number, because it can be changed into a prime (20201233103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246356461 + ... + 246356542.

It is an arithmetic number, because the mean of its divisors is an integer number (5173486542).

Almost surely, 2^20201233123 is an apocalyptic number.

20201233123 is a deficient number, since it is larger than the sum of its proper divisors (492713045).

20201233123 is an equidigital number, since it uses as much as digits as its factorization.

20201233123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492713044.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20201233123 its reverse (32133210202), we get a palindrome (52334443325).

The spelling of 20201233123 in words is "twenty billion, two hundred one million, two hundred thirty-three thousand, one hundred twenty-three".