200121112123 has 8 divisors (see below), whose sum is σ = 202950894816. Its totient is φ = 197291640000.

The previous prime is 200121112117. The next prime is 200121112127. The reversal of 200121112123 is 321211121002.

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 200121112123 - 2⁹ = 200121111611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121112097 and 200121112106.

It is not an unprimeable number, because it can be changed into a prime (200121112127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1423965 + ... + 1558177.

It is an arithmetic number, because the mean of its divisors is an integer number (25368861852).

Almost surely, 2^200121112123 is an apocalyptic number.

200121112123 is a deficient number, since it is larger than the sum of its proper divisors (2829782693).

200121112123 is a wasteful number, since it uses less digits than its factorization.

200121112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155285.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 200121112123 its reverse (321211121002), we get a palindrome (521332233125).

The spelling of 200121112123 in words is "two hundred billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twenty-three".