1000111102020 has 36 divisors (see below), whose sum is σ = 3033670343340. Its totient is φ = 266696293824.

The previous prime is 1000111101943. The next prime is 1000111102051. The reversal of 1000111102020 is 202011110001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 649864924164 + 350246177856 = 806142^2 + 591816^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 1000111101993 and 1000111102011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2778086215 + ... + 2778086574.

Almost surely, 2^{1000111102020} is an apocalyptic number.

1000111102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000111102020 is an abundant number, since it is smaller than the sum of its proper divisors (2033559241320).

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

1000111102020 is a wasteful number, since it uses less digits than its factorization.

1000111102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556172804 (or 5556172799 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1000111102020 its reverse (202011110001), we get a palindrome (1202122212021).

The spelling of 1000111102020 in words is "one trillion, one hundred eleven million, one hundred two thousand, twenty".