100200120221 has 4 divisors (see below), whose sum is σ = 100445108700. Its totient is φ = 99955131744.

The previous prime is 100200120133. The next prime is 100200120227. The reversal of 100200120221 is 122021002001.

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 77291784196 + 22908336025 = 278014^2 + 151355^2 .

It is a cyclic number.

It is not a de Polignac number, because 100200120221 - 2¹⁴ = 100200103837 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 (100200120227) 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, 122493626 + ... + 122494443.

It is an arithmetic number, because the mean of its divisors is an integer number (25111277175).

Almost surely, 2^100200120221 is an apocalyptic number.

It is an amenable number.

100200120221 is a deficient number, since it is larger than the sum of its proper divisors (244988479).

100200120221 is an equidigital number, since it uses as much as digits as its factorization.

100200120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244988478.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100200120221 its reverse (122021002001), we get a palindrome (222221122222).

The spelling of 100200120221 in words is "one hundred billion, two hundred million, one hundred twenty thousand, two hundred twenty-one".