200121210010 has 8 divisors (see below), whose sum is σ = 360218178036. Its totient is φ = 80048484000.

The previous prime is 200121209999. The next prime is 200121210013. The reversal of 200121210010 is 10012121002.

It can be written as a sum of positive squares in 2 ways, for example, as 167663224089 + 32457985921 = 409467^2 + 180161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 20012121001 = 200121210010 / (2 + 0 + 0 + 1 + 2 + 1 + 2 + 1 + 0 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (200121210013) 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, 10006060491 + ... + 10006060510.

Almost surely, 2^200121210010 is an apocalyptic number.

200121210010 is a deficient number, since it is larger than the sum of its proper divisors (160096968026).

200121210010 is a wasteful number, since it uses less digits than its factorization.

200121210010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20012121008.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 200121210010 its reverse (10012121002), we get a palindrome (210133331012).

The spelling of 200121210010 in words is "two hundred billion, one hundred twenty-one million, two hundred ten thousand, ten".