20001112123 has 8 divisors (see below), whose sum is σ = 20568678480. Its totient is φ = 19437342720.

The previous prime is 20001112121. The next prime is 20001112151. The reversal of 20001112123 is 32121110002.

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 20001112123 - 2¹ = 20001112121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001112121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938553 + ... + 959626.

It is an arithmetic number, because the mean of its divisors is an integer number (2571084810).

Almost surely, 2^20001112123 is an apocalyptic number.

20001112123 is a deficient number, since it is larger than the sum of its proper divisors (567566357).

20001112123 is a wasteful number, since it uses less digits than its factorization.

20001112123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898477.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20001112123 its reverse (32121110002), we get a palindrome (52122222125).

The spelling of 20001112123 in words is "twenty billion, one million, one hundred twelve thousand, one hundred twenty-three".