200121031213 has 4 divisors (see below), whose sum is σ = 200161969020. Its totient is φ = 200080093408.

The previous prime is 200121031193. The next prime is 200121031217. The reversal of 200121031213 is 312130121002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 170129026089 + 29992005124 = 412467^2 + 173182^2 .

It is a cyclic number.

It is not a de Polignac number, because 200121031213 - 2¹⁷ = 200120900141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121031217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20461570 + ... + 20471347.

It is an arithmetic number, because the mean of its divisors is an integer number (50040492255).

Almost surely, 2^200121031213 is an apocalyptic number.

It is an amenable number.

200121031213 is a deficient number, since it is larger than the sum of its proper divisors (40937807).

200121031213 is an equidigital number, since it uses as much as digits as its factorization.

200121031213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40937806.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 200121031213 its reverse (312130121002), we get a palindrome (512251152215).

The spelling of 200121031213 in words is "two hundred billion, one hundred twenty-one million, thirty-one thousand, two hundred thirteen".