20123303121 has 24 divisors (see below), whose sum is σ = 31916705184. Its totient is φ = 12626383680.

The previous prime is 20123303089. The next prime is 20123303147. The reversal of 20123303121 is 12130332102.

20123303121 is a `hidden beast` number, since 20 + 1 + 2 + 330 + 312 + 1 = 666.

It is not a de Polignac number, because 20123303121 - 2⁵ = 20123303089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20123303094 and 20123303103.

It is not an unprimeable number, because it can be changed into a prime (20123303171) 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 23 ways as a sum of consecutive naturals, for example, 2431515 + ... + 2439776.

It is an arithmetic number, because the mean of its divisors is an integer number (1329862716).

Almost surely, 2^20123303121 is an apocalyptic number.

It is an amenable number.

20123303121 is a deficient number, since it is larger than the sum of its proper divisors (11793402063).

20123303121 is an equidigital number, since it uses as much as digits as its factorization.

20123303121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871323 (or 4871311 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20123303121 its reverse (12130332102), we get a palindrome (32253635223).

The spelling of 20123303121 in words is "twenty billion, one hundred twenty-three million, three hundred three thousand, one hundred twenty-one".