2001112122123 has 12 divisors (see below), whose sum is σ = 2891020235688. Its totient is φ = 1333832464320.

The previous prime is 2001112122011. The next prime is 2001112122143. The reversal of 2001112122123 is 3212212111002.

It is not a de Polignac number, because 2001112122123 - 2²⁶ = 2001045013259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001112122096 and 2001112122105.

It is not an unprimeable number, because it can be changed into a prime (2001112122143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20137998 + ... + 20237123.

It is an arithmetic number, because the mean of its divisors is an integer number (240918352974).

Almost surely, 2^{2001112122123} is an apocalyptic number.

2001112122123 is a deficient number, since it is larger than the sum of its proper divisors (889908113565).

2001112122123 is a wasteful number, since it uses less digits than its factorization.

2001112122123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40380634 (or 40380631 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2001112122123 its reverse (3212212111002), we get a palindrome (5213324233125).

The spelling of 2001112122123 in words is "two trillion, one billion, one hundred twelve million, one hundred twenty-two thousand, one hundred twenty-three".