200121202001220 has 96 divisors (see below), whose sum is σ = 584717504087808. Its totient is φ = 51044049864192.

The previous prime is 200121202001209. The next prime is 200121202001233. The reversal of 200121202001220 is 22100202121002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 200121202001220.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 50470402 + ... + 54290918.

It is an arithmetic number, because the mean of its divisors is an integer number (6090807334248).

Almost surely, 2^{200121202001220} is an apocalyptic number.

200121202001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121202001220 is an abundant number, since it is smaller than the sum of its proper divisors (384596302086588).

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

200121202001220 is a wasteful number, since it uses less digits than its factorization.

200121202001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3858509 (or 3858507 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 200121202001220 its reverse (22100202121002), we get a palindrome (222221404122222).

The spelling of 200121202001220 in words is "two hundred trillion, one hundred twenty-one billion, two hundred two million, one thousand, two hundred twenty".