200121220120 has 64 divisors (see below), whose sum is σ = 451087509600. Its totient is φ = 79903810560.

The previous prime is 200121220111. The next prime is 200121220127. The reversal of 200121220120 is 21022121002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 200121220120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121220127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84402535 + ... + 84404905.

Almost surely, 2^200121220120 is an apocalyptic number.

200121220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121220120 is an abundant number, since it is smaller than the sum of its proper divisors (250966289480).

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

200121220120 is a wasteful number, since it uses less digits than its factorization.

200121220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308 (or 5304 counting only the distinct ones).

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

Adding to 200121220120 its reverse (21022121002), we get a palindrome (221143341122).

The spelling of 200121220120 in words is "two hundred billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty".