1021110112020 has 96 divisors (see below), whose sum is σ = 2872136631168. Its totient is φ = 271057208832.

The previous prime is 1021110111991. The next prime is 1021110112079. The reversal of 1021110112020 is 202110111201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1021110111987 and 1021110112005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16898902 + ... + 16959218.

It is an arithmetic number, because the mean of its divisors is an integer number (29918089908).

Almost surely, 2^{1021110112020} is an apocalyptic number.

1021110112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021110112020 is an abundant number, since it is smaller than the sum of its proper divisors (1851026519148).

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

1021110112020 is a wasteful number, since it uses less digits than its factorization.

1021110112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61609 (or 61607 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1021110112020 its reverse (202110111201), we get a palindrome (1223220223221).

The spelling of 1021110112020 in words is "one trillion, twenty-one billion, one hundred ten million, one hundred twelve thousand, twenty".