200001212100 has 72 divisors (see below), whose sum is σ = 642966868320. Its totient is φ = 53333655840.

The previous prime is 200001212087. The next prime is 200001212101. The reversal of 200001212100 is 1212100002.

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

It is not an unprimeable number, because it can be changed into a prime (200001212101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37034562 + ... + 37039961.

Almost surely, 2^200001212100 is an apocalyptic number.

200001212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200001212100 is an abundant number, since it is smaller than the sum of its proper divisors (442965656220).

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

200001212100 is a wasteful number, since it uses less digits than its factorization.

200001212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74074546 (or 74074533 counting only the distinct ones).

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

Adding to 200001212100 its reverse (1212100002), we get a palindrome (201213312102).

It can be divided in two parts, 20000 and 1212100, that added together give a square (1232100 = 1110²).

The spelling of 200001212100 in words is "two hundred billion, one million, two hundred twelve thousand, one hundred".