100011200020 has 12 divisors (see below), whose sum is σ = 210023520084. Its totient is φ = 40004480000.

The previous prime is 100011199997. The next prime is 100011200027. The reversal of 100011200020 is 20002110001.

It can be written as a sum of positive squares in 2 ways, for example, as 30634800784 + 69376399236 = 175028^2 + 263394^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100011199976 and 100011200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100011200027) 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, 2500279981 + ... + 2500280020.

It is an arithmetic number, because the mean of its divisors is an integer number (17501960007).

Almost surely, 2^100011200020 is an apocalyptic number.

100011200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100011200020 is an abundant number, since it is smaller than the sum of its proper divisors (110012320064).

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

100011200020 is a wasteful number, since it uses less digits than its factorization.

100011200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000560010 (or 5000560008 counting only the distinct ones).

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

Adding to 100011200020 its reverse (20002110001), we get a palindrome (120013310021).

The spelling of 100011200020 in words is "one hundred billion, eleven million, two hundred thousand, twenty".