201100020100 has 36 divisors (see below), whose sum is σ = 498728051584. Its totient is φ = 68948578080.

The previous prime is 201100020097. The next prime is 201100020119. The reversal of 201100020100 is 1020001102.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143642172 + ... + 143643571.

Almost surely, 2^201100020100 is an apocalyptic number.

201100020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201100020100 is an abundant number, since it is smaller than the sum of its proper divisors (297628031484).

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

201100020100 is a wasteful number, since it uses less digits than its factorization.

201100020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287285764 (or 287285757 counting only the distinct ones).

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

Adding to 201100020100 its reverse (1020001102), we get a palindrome (202120021202).

The spelling of 201100020100 in words is "two hundred one billion, one hundred million, twenty thousand, one hundred".