201100220123 has 4 divisors (see below), whose sum is σ = 219382058328. Its totient is φ = 182818381920.

The previous prime is 201100220117. The next prime is 201100220173. The reversal of 201100220123 is 321022001102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201100220123 - 2²⁴ = 201083442907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201100220098 and 201100220107.

It is not an unprimeable number, because it can be changed into a prime (201100220173) 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, 9140919086 + ... + 9140919107.

It is an arithmetic number, because the mean of its divisors is an integer number (54845514582).

Almost surely, 2^201100220123 is an apocalyptic number.

201100220123 is a deficient number, since it is larger than the sum of its proper divisors (18281838205).

201100220123 is a wasteful number, since it uses less digits than its factorization.

201100220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18281838204.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 201100220123 its reverse (321022001102), we get a palindrome (522122221225).

The spelling of 201100220123 in words is "two hundred one billion, one hundred million, two hundred twenty thousand, one hundred twenty-three".