1021110110020 has 192 divisors, whose sum is σ = 3004281778176. Its totient is φ = 281012497920.

The previous prime is 1021110109993. The next prime is 1021110110029. The reversal of 1021110110020 is 200110111201.

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 = 1021110109979 and 1021110110006.

It is not an unprimeable number, because it can be changed into a prime (1021110110029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 648334 + ... + 1569253.

It is an arithmetic number, because the mean of its divisors is an integer number (15647300928).

Almost surely, 2^{1021110110020} is an apocalyptic number.

1021110110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021110110020 is an abundant number, since it is smaller than the sum of its proper divisors (1983171668156).

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

1021110110020 is a wasteful number, since it uses less digits than its factorization.

1021110110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217650 (or 2217648 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1021110110020 its reverse (200110111201), we get a palindrome (1221220221221).

The spelling of 1021110110020 in words is "one trillion, twenty-one billion, one hundred ten million, one hundred ten thousand, twenty".