1000001021100 has 72 divisors (see below), whose sum is σ = 2960623216320. Its totient is φ = 260465378880.

The previous prime is 1000001021093. The next prime is 1000001021119. The reversal of 1000001021100 is 11201000001.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38746830 + ... + 38772629.

Almost surely, 2^{1000001021100} is an apocalyptic number.

1000001021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000001021100 is an abundant number, since it is smaller than the sum of its proper divisors (1960622195220).

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

1000001021100 is a wasteful number, since it uses less digits than its factorization.

1000001021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77519519 (or 77519512 counting only the distinct ones).

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

Adding to 1000001021100 its reverse (11201000001), we get a palindrome (1011202021101).

The spelling of 1000001021100 in words is "one trillion, one million, twenty-one thousand, one hundred".