20201000122123 has 4 divisors (see below), whose sum is σ = 20202387472728. Its totient is φ = 20199612771520.

The previous prime is 20201000122063. The next prime is 20201000122187. The reversal of 20201000122123 is 32122100010202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201000122123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201000122097 and 20201000122106.

It is not an unprimeable number, because it can be changed into a prime (20201001122123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693653461 + ... + 693682582.

It is an arithmetic number, because the mean of its divisors is an integer number (5050596868182).

Almost surely, 2^{20201000122123} is an apocalyptic number.

20201000122123 is a deficient number, since it is larger than the sum of its proper divisors (1387350605).

20201000122123 is a wasteful number, since it uses less digits than its factorization.

20201000122123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387350604.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20201000122123 its reverse (32122100010202), we get a palindrome (52323100132325).

The spelling of 20201000122123 in words is "twenty trillion, two hundred one billion, one hundred twenty-two thousand, one hundred twenty-three".