1020200100 has 72 divisors (see below), whose sum is σ = 2960831328. Its totient is φ = 271219200.

The previous prime is 1020200099. The next prime is 1020200113. The reversal of 1020200100 is 10020201.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 96055 + ... + 106145.

Almost surely, 2^1020200100 is an apocalyptic number.

1020200100 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 1020200100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480415664).

1020200100 is an abundant number, since it is smaller than the sum of its proper divisors (1940631228).

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

1020200100 is a wasteful number, since it uses less digits than its factorization.

1020200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10445 (or 10438 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1020200100 is about 31940.5713787340. The cubic root of 1020200100 is about 1006.6885304863.

Adding to 1020200100 its reverse (10020201), we get a palindrome (1030220301).

The spelling of 1020200100 in words is "one billion, twenty million, two hundred thousand, one hundred".