20323121123 has 4 divisors (see below), whose sum is σ = 20567978088. Its totient is φ = 20078264160.

The previous prime is 20323121113. The next prime is 20323121131. The reversal of 20323121123 is 32112132302.

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 20323121123 - 2¹⁰ = 20323120099 is a prime.

It is a super-2 number, since 2×20323121123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20323121095 and 20323121104.

It is not an unprimeable number, because it can be changed into a prime (20323121113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122428358 + ... + 122428523.

It is an arithmetic number, because the mean of its divisors is an integer number (5141994522).

Almost surely, 2^20323121123 is an apocalyptic number.

20323121123 is a deficient number, since it is larger than the sum of its proper divisors (244856965).

20323121123 is an equidigital number, since it uses as much as digits as its factorization.

20323121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244856964.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20323121123 its reverse (32112132302), we get a palindrome (52435253425).

The spelling of 20323121123 in words is "twenty billion, three hundred twenty-three million, one hundred twenty-one thousand, one hundred twenty-three".