200121311 has 4 divisors (see below), whose sum is σ = 215515272. Its totient is φ = 184727352.

The previous prime is 200121247. The next prime is 200121329. The reversal of 200121311 is 113121002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113121002 = 2 ⋅56560501.

It is a cyclic number.

It is not a de Polignac number, because 200121311 - 2⁶ = 200121247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121292 and 200121301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121391) 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, 7696961 + ... + 7696986.

It is an arithmetic number, because the mean of its divisors is an integer number (53878818).

Almost surely, 2^200121311 is an apocalyptic number.

200121311 is a deficient number, since it is larger than the sum of its proper divisors (15393961).

200121311 is a wasteful number, since it uses less digits than its factorization.

200121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15393960.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 200121311 is about 14146.4239650874. The cubic root of 200121311 is about 584.9217622499.

Adding to 200121311 its reverse (113121002), we get a palindrome (313242313).

The spelling of 200121311 in words is "two hundred million, one hundred twenty-one thousand, three hundred eleven".