200100122221 has 4 divisors (see below), whose sum is σ = 200132543772. Its totient is φ = 200067700672.

The previous prime is 200100122213. The next prime is 200100122231. The reversal of 200100122221 is 122221001002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70219170121 + 129880952100 = 264989^2 + 360390^2 .

It is a cyclic number.

It is not a de Polignac number, because 200100122221 - 2³ = 200100122213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200100122231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16201516 + ... + 16213861.

It is an arithmetic number, because the mean of its divisors is an integer number (50033135943).

Almost surely, 2^200100122221 is an apocalyptic number.

It is an amenable number.

200100122221 is a deficient number, since it is larger than the sum of its proper divisors (32421551).

200100122221 is an equidigital number, since it uses as much as digits as its factorization.

200100122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32421550.

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

Adding to 200100122221 its reverse (122221001002), we get a palindrome (322321123223).

The spelling of 200100122221 in words is "two hundred billion, one hundred million, one hundred twenty-two thousand, two hundred twenty-one".