200121212323 has 4 divisors (see below), whose sum is σ = 211893048360. Its totient is φ = 188349376288.

The previous prime is 200121212297. The next prime is 200121212327. The reversal of 200121212323 is 323212121002.

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 200121212323 - 2³³ = 191531277731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200121212323.

It is not an unprimeable number, because it can be changed into a prime (200121212327) 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, 5885917993 + ... + 5885918026.

It is an arithmetic number, because the mean of its divisors is an integer number (52973262090).

Almost surely, 2^200121212323 is an apocalyptic number.

200121212323 is a deficient number, since it is larger than the sum of its proper divisors (11771836037).

200121212323 is a wasteful number, since it uses less digits than its factorization.

200121212323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11771836036.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 200121212323 its reverse (323212121002), we get a palindrome (523333333325).

The spelling of 200121212323 in words is "two hundred billion, one hundred twenty-one million, two hundred twelve thousand, three hundred twenty-three".