20123121123329 has 16 divisors (see below), whose sum is σ = 23023691873280. Its totient is φ = 17229015040320.

The previous prime is 20123121123323. The next prime is 20123121123373. The reversal of 20123121123329 is 92332112132102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123121123329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20123121123295 and 20123121123304.

It is not an unprimeable number, because it can be changed into a prime (20123121123323) 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 15 ways as a sum of consecutive naturals, for example, 50322992 + ... + 50721294.

It is an arithmetic number, because the mean of its divisors is an integer number (1438980742080).

Almost surely, 2^{20123121123329} is an apocalyptic number.

It is an amenable number.

20123121123329 is a deficient number, since it is larger than the sum of its proper divisors (2900570749951).

20123121123329 is a wasteful number, since it uses less digits than its factorization.

20123121123329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406400.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 20123121123329 in words is "twenty trillion, one hundred twenty-three billion, one hundred twenty-one million, one hundred twenty-three thousand, three hundred twenty-nine".