100021120002 has 160 divisors (see below), whose sum is σ = 239921510400. Its totient is φ = 31075228800.

The previous prime is 100021119959. The next prime is 100021120051. The reversal of 100021120002 is 200021120001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 96266199 + ... + 96267237.

It is an arithmetic number, because the mean of its divisors is an integer number (1499509440).

Almost surely, 2^100021120002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100021120002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119960755200).

100021120002 is an abundant number, since it is smaller than the sum of its proper divisors (139900390398).

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

100021120002 is a wasteful number, since it uses less digits than its factorization.

100021120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100021120002 its reverse (200021120001), we get a palindrome (300042240003).

Subtracting 100021120002 from its reverse (200021120001), we obtain a palindrome (99999999999).

The spelling of 100021120002 in words is "one hundred billion, twenty-one million, one hundred twenty thousand, two".