1021110220120 has 64 divisors (see below), whose sum is σ = 2355166497600. Its totient is φ = 398205726720.

The previous prime is 1021110220111. The next prime is 1021110220147. The reversal of 1021110220120 is 210220111201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021110220120.

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, 2157936 + ... + 2588224.

It is an arithmetic number, because the mean of its divisors is an integer number (36799476525).

Almost surely, 2^{1021110220120} is an apocalyptic number.

1021110220120 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 1021110220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177583248800).

1021110220120 is an abundant number, since it is smaller than the sum of its proper divisors (1334056277480).

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

1021110220120 is a wasteful number, since it uses less digits than its factorization.

1021110220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431788 (or 431784 counting only the distinct ones).

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

Adding to 1021110220120 its reverse (210220111201), we get a palindrome (1231330331321).

The spelling of 1021110220120 in words is "one trillion, twenty-one billion, one hundred ten million, two hundred twenty thousand, one hundred twenty".