100021120512 has 80 divisors (see below), whose sum is σ = 268251469200. Its totient is φ = 33116536832.

The previous prime is 100021120429. The next prime is 100021120513. The reversal of 100021120512 is 215021120001.

It is a junction number, because it is equal to n+sod(n) for n = 100021120491 and 100021120500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021120513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10348 + ... + 447380.

It is an arithmetic number, because the mean of its divisors is an integer number (3353143365).

Almost surely, 2^100021120512 is an apocalyptic number.

100021120512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100021120512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134125734600).

100021120512 is an abundant number, since it is smaller than the sum of its proper divisors (168230348688).

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

100021120512 is an equidigital number, since it uses as much as digits as its factorization.

100021120512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437203 (or 437187 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 100021120512 its reverse (215021120001), we get a palindrome (315042240513).

The spelling of 100021120512 in words is "one hundred billion, twenty-one million, one hundred twenty thousand, five hundred twelve".