20123133123 has 4 divisors (see below), whose sum is σ = 26830844168. Its totient is φ = 13415422080.

The previous prime is 20123133097. The next prime is 20123133133. The reversal of 20123133123 is 32133132102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20123133123 - 2¹² = 20123129027 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 20123133123.

It is not an unprimeable number, because it can be changed into a prime (20123133133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353855518 + ... + 3353855523.

It is an arithmetic number, because the mean of its divisors is an integer number (6707711042).

Almost surely, 2^20123133123 is an apocalyptic number.

20123133123 is a deficient number, since it is larger than the sum of its proper divisors (6707711045).

20123133123 is an equidigital number, since it uses as much as digits as its factorization.

20123133123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6707711044.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20123133123 its reverse (32133132102), we get a palindrome (52256265225).

The spelling of 20123133123 in words is "twenty billion, one hundred twenty-three million, one hundred thirty-three thousand, one hundred twenty-three".