201100002100 has 36 divisors (see below), whose sum is σ = 447030599148. Its totient is φ = 78478048000.

The previous prime is 201100002083. The next prime is 201100002101. The reversal of 201100002100 is 1200001102.

It can be written as a sum of positive squares in 6 ways, for example, as 72698179876 + 128401822224 = 269626^2 + 358332^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201100002101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24520291 + ... + 24528490.

It is an arithmetic number, because the mean of its divisors is an integer number (12417516643).

Almost surely, 2^201100002100 is an apocalyptic number.

201100002100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201100002100 is an abundant number, since it is smaller than the sum of its proper divisors (245930597048).

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

201100002100 is a wasteful number, since it uses less digits than its factorization.

201100002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49048836 (or 49048829 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 201100002100 its reverse (1200001102), we get a palindrome (202300003202).

The spelling of 201100002100 in words is "two hundred one billion, one hundred million, two thousand, one hundred".