100021001100 has 576 divisors, whose sum is σ = 327401294976. Its totient is φ = 23463198720.

The previous prime is 100021001089. The next prime is 100021001111. The reversal of 100021001100 is 1100120001.

It is an interprime number because it is at equal distance from previous prime (100021001089) and next prime (100021001111).

It is a super-2 number, since 2×100021001100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 730080232 + ... + 730080368.

It is an arithmetic number, because the mean of its divisors is an integer number (568405026).

Almost surely, 2^100021001100 is an apocalyptic number.

100021001100 is a gapful number since it is divisible by the number (10) 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 100021001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163700647488).

100021001100 is an abundant number, since it is smaller than the sum of its proper divisors (227380293876).

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

100021001100 is a wasteful number, since it uses less digits than its factorization.

100021001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 100021001100 its reverse (1100120001), we get a palindrome (101121121101).

The spelling of 100021001100 in words is "one hundred billion, twenty-one million, one thousand, one hundred".