1100202100020 has 72 divisors (see below), whose sum is σ = 3337638420480. Its totient is φ = 293355691200.

The previous prime is 1100202099937. The next prime is 1100202100043. The reversal of 1100202100020 is 200012020011.

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

It is a junction number, because it is equal to n+sod(n) for n = 1100202099975 and 1100202100011.

It is a congruent number.

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, 1375245 + ... + 2022795.

Almost surely, 2^{1100202100020} is an apocalyptic number.

1100202100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100202100020 is an abundant number, since it is smaller than the sum of its proper divisors (2237436320460).

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

1100202100020 is a wasteful number, since it uses less digits than its factorization.

1100202100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657005 (or 657000 counting only the distinct ones).

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

Adding to 1100202100020 its reverse (200012020011), we get a palindrome (1300214120031).

The spelling of 1100202100020 in words is "one trillion, one hundred billion, two hundred two million, one hundred thousand, twenty".