20123233121 has 8 divisors (see below), whose sum is σ = 20435194080. Its totient is φ = 19811613888.

The previous prime is 20123233111. The next prime is 20123233129. The reversal of 20123233121 is 12133232102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20123233121 - 2¹⁸ = 20122970977 is a prime.

It is a super-2 number, since 2×20123233121² (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 = 20123233093 and 20123233102.

It is not an unprimeable number, because it can be changed into a prime (20123233129) 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 7 ways as a sum of consecutive naturals, for example, 34550 + ... + 203568.

It is an arithmetic number, because the mean of its divisors is an integer number (2554399260).

Almost surely, 2^20123233121 is an apocalyptic number.

It is an amenable number.

20123233121 is a deficient number, since it is larger than the sum of its proper divisors (311960959).

20123233121 is a wasteful number, since it uses less digits than its factorization.

20123233121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170863.

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

Adding to 20123233121 its reverse (12133232102), we get a palindrome (32256465223).

The spelling of 20123233121 in words is "twenty billion, one hundred twenty-three million, two hundred thirty-three thousand, one hundred twenty-one".