200121220210 has 16 divisors (see below), whose sum is σ = 360226863000. Its totient is φ = 80046562176.

The previous prime is 200121220193. The next prime is 200121220231. The reversal of 200121220210 is 12022121002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 199120320441 + 1000899769 = 446229^2 + 31637^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241726 + ... + 677254.

Almost surely, 2^200121220210 is an apocalyptic number.

200121220210 is a deficient number, since it is larger than the sum of its proper divisors (160105642790).

200121220210 is a wasteful number, since it uses less digits than its factorization.

200121220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481485.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 200121220210 its reverse (12022121002), we get a palindrome (212143341212).

The spelling of 200121220210 in words is "two hundred billion, one hundred twenty-one million, two hundred twenty thousand, two hundred ten".