1000111202020 has 144 divisors (see below), whose sum is σ = 2510744721408. Its totient is φ = 327780161280.

The previous prime is 1000111202003. The next prime is 1000111202039. The reversal of 1000111202020 is 202021110001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1000111201988 and 1000111202006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156337462 + ... + 156343858.

It is an arithmetic number, because the mean of its divisors is an integer number (17435727232).

Almost surely, 2^{1000111202020} is an apocalyptic number.

1000111202020 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 1000111202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1255372360704).

1000111202020 is an abundant number, since it is smaller than the sum of its proper divisors (1510633519388).

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

1000111202020 is a wasteful number, since it uses less digits than its factorization.

1000111202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570 (or 8545 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1000111202020 its reverse (202021110001), we get a palindrome (1202132312021).

It can be divided in two parts, 100011 and 1202020, that added together give a palindrome (1302031).

The spelling of 1000111202020 in words is "one trillion, one hundred eleven million, two hundred two thousand, twenty".