1021112000020 has 48 divisors (see below), whose sum is σ = 2450857570560. Its totient is φ = 350068575744.

The previous prime is 1021111999997. The next prime is 1021112000033. The reversal of 1021112000020 is 200002111201.

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 = 1021111999970 and 1021112000006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1587321 + ... + 2135839.

It is an arithmetic number, because the mean of its divisors is an integer number (51059532720).

Almost surely, 2^{1021112000020} is an apocalyptic number.

1021112000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021112000020 is an abundant number, since it is smaller than the sum of its proper divisors (1429745570540).

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

1021112000020 is a wasteful number, since it uses less digits than its factorization.

1021112000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561832 (or 561830 counting only the distinct ones).

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

Adding to 1021112000020 its reverse (200002111201), we get a palindrome (1221114111221).

The spelling of 1021112000020 in words is "one trillion, twenty-one billion, one hundred twelve million, twenty", and thus it is an aban number.