1021120112020 has 48 divisors (see below), whose sum is σ = 2173891345920. Its totient is φ = 402822395136.

The previous prime is 1021120111969. The next prime is 1021120112021. The reversal of 1021120112020 is 202110211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021120112021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37863301 + ... + 37890259.

It is an arithmetic number, because the mean of its divisors is an integer number (45289403040).

Almost surely, 2^{1021120112020} is an apocalyptic number.

1021120112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021120112020 is an abundant number, since it is smaller than the sum of its proper divisors (1152771233900).

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

1021120112020 is a wasteful number, since it uses less digits than its factorization.

1021120112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52984 (or 52982 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021120112020 its reverse (202110211201), we get a palindrome (1223230323221).

The spelling of 1021120112020 in words is "one trillion, twenty-one billion, one hundred twenty million, one hundred twelve thousand, twenty".