200123123211211 has 16 divisors (see below), whose sum is σ = 201160467900000. Its totient is φ = 199087251607296.

The previous prime is 200123123211191. The next prime is 200123123211233. The reversal of 200123123211211 is 112112321321002.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200123123211211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200123123211241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1868527140 + ... + 1868634238.

It is an arithmetic number, because the mean of its divisors is an integer number (12572529243750).

Almost surely, 2^{200123123211211} is an apocalyptic number.

200123123211211 is a deficient number, since it is larger than the sum of its proper divisors (1037344688789).

200123123211211 is a wasteful number, since it uses less digits than its factorization.

200123123211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113886.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 200123123211211 its reverse (112112321321002), we get a palindrome (312235444532213).

The spelling of 200123123211211 in words is "two hundred trillion, one hundred twenty-three billion, one hundred twenty-three million, two hundred eleven thousand, two hundred eleven".