1021113320100 has 144 divisors (see below), whose sum is σ = 3075838217088. Its totient is φ = 261308021760.

The previous prime is 1021113320093. The next prime is 1021113320113. The reversal of 1021113320100 is 10233111201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1021113320100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180217 + ... + 1440383.

Almost surely, 2^{1021113320100} is an apocalyptic number.

1021113320100 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 1021113320100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1537919108544).

1021113320100 is an abundant number, since it is smaller than the sum of its proper divisors (2054724896988).

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

1021113320100 is a wasteful number, since it uses less digits than its factorization.

1021113320100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260294 (or 1260287 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1021113320100 its reverse (10233111201), we get a palindrome (1031346431301).

The spelling of 1021113320100 in words is "one trillion, twenty-one billion, one hundred thirteen million, three hundred twenty thousand, one hundred".