200121100120 has 64 divisors (see below), whose sum is σ = 474031144800. Its totient is φ = 75825745920.

The previous prime is 200121100117. The next prime is 200121100121. The reversal of 200121100120 is 21001121002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 200121100097 and 200121100106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121100121) 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, 9685000 + ... + 9705640.

Almost surely, 2^200121100120 is an apocalyptic number.

200121100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121100120 is an abundant number, since it is smaller than the sum of its proper divisors (273910044680).

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

200121100120 is a wasteful number, since it uses less digits than its factorization.

200121100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33428 (or 33424 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 200121100120 its reverse (21001121002), we get a palindrome (221122221122).

The spelling of 200121100120 in words is "two hundred billion, one hundred twenty-one million, one hundred thousand, one hundred twenty".