200000121210 has 48 divisors (see below), whose sum is σ = 520071575400. Its totient is φ = 53326056960.

The previous prime is 200000121193. The next prime is 200000121241. The reversal of 200000121210 is 12121000002.

It can be written as a sum of positive squares in 4 ways, for example, as 188695540881 + 11304580329 = 434391^2 + 106323^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 200000121192 and 200000121201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 524766 + ... + 821814.

Almost surely, 2^200000121210 is an apocalyptic number.

200000121210 is an abundant number, since it is smaller than the sum of its proper divisors (320071454190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

200000121210 is a wasteful number, since it uses less digits than its factorization.

200000121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304543 (or 304540 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 200000121210 its reverse (12121000002), we get a palindrome (212121121212).

The spelling of 200000121210 in words is "two hundred billion, one hundred twenty-one thousand, two hundred ten".