20123121123330 has 256 divisors, whose sum is σ = 54229346242560. Its totient is φ = 4755307392000.

The previous prime is 20123121123323. The next prime is 20123121123373. The reversal of 20123121123330 is 3332112132102.

It is a self number, because there is not a number n which added to its sum of digits gives 20123121123330.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 138277105 + ... + 138422555.

It is an arithmetic number, because the mean of its divisors is an integer number (211833383760).

Almost surely, 2^{20123121123330} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20123121123330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27114673121280).

20123121123330 is an abundant number, since it is smaller than the sum of its proper divisors (34106225119230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123121123330 is a wasteful number, since it uses less digits than its factorization.

20123121123330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145737.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 20123121123330 its reverse (3332112132102), we get a palindrome (23455233255432).

The spelling of 20123121123330 in words is "twenty trillion, one hundred twenty-three billion, one hundred twenty-one million, one hundred twenty-three thousand, three hundred thirty".