100202120208 has 30 divisors (see below), whose sum is σ = 280426767374. Its totient is φ = 33400706688.

The previous prime is 100202120153. The next prime is 100202120209. The reversal of 100202120208 is 802021202001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 89971202304 + 10230917904 = 299952^2 + 101148^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (100202120209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 347923885 + ... + 347924172.

Almost surely, 2^100202120208 is an apocalyptic number.

100202120208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

100202120208 is an abundant number, since it is smaller than the sum of its proper divisors (180224647166).

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

100202120208 is a wasteful number, since it uses less digits than its factorization.

100202120208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695848071 (or 695848062 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 100202120208 its reverse (802021202001), we get a palindrome (902223322209).

The spelling of 100202120208 in words is "one hundred billion, two hundred two million, one hundred twenty thousand, two hundred eight".