20102001100 has 18 divisors (see below), whose sum is σ = 43621342604. Its totient is φ = 8040800400.

The previous prime is 20102001037. The next prime is 20102001103. The reversal of 20102001100 is 110020102.

It is not an unprimeable number, because it can be changed into a prime (20102001103) 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, 100509906 + ... + 100510105.

Almost surely, 2^20102001100 is an apocalyptic number.

20102001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102001100 is an abundant number, since it is smaller than the sum of its proper divisors (23519341504).

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

20102001100 is a wasteful number, since it uses less digits than its factorization.

20102001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201020025 (or 201020018 counting only the distinct ones).

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

Adding to 20102001100 its reverse (110020102), we get a palindrome (20212021202).

The spelling of 20102001100 in words is "twenty billion, one hundred two million, one thousand, one hundred".