200121006 has 16 divisors (see below), whose sum is σ = 402930000. Its totient is φ = 66259008.

The previous prime is 200121001. The next prime is 200121007. The reversal of 200121006 is 600121002.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200120982 and 200121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111031 + ... + 112818.

It is an arithmetic number, because the mean of its divisors is an integer number (25183125).

Almost surely, 2^200121006 is an apocalyptic number.

200121006 is an abundant number, since it is smaller than the sum of its proper divisors (202808994).

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

200121006 is a wasteful number, since it uses less digits than its factorization.

200121006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224003.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 200121006 is about 14146.4131849738. The cubic root of 200121006 is about 584.9214650947.

Adding to 200121006 its reverse (600121002), we get a palindrome (800242008).

The spelling of 200121006 in words is "two hundred million, one hundred twenty-one thousand, six".