2021111211120 has 40 divisors (see below), whose sum is σ = 6265444755216. Its totient is φ = 538962989568.

The previous prime is 2021111211103. The next prime is 2021111211127. The reversal of 2021111211120 is 211121111202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2021111211120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111211127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4210648117 + ... + 4210648596.

Almost surely, 2^{2021111211120} is an apocalyptic number.

2021111211120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021111211120 is an abundant number, since it is smaller than the sum of its proper divisors (4244333544096).

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

2021111211120 is a wasteful number, since it uses less digits than its factorization.

2021111211120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421296729 (or 8421296723 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2021111211120 its reverse (211121111202), we get a palindrome (2232232322322).

The spelling of 2021111211120 in words is "two trillion, twenty-one billion, one hundred eleven million, two hundred eleven thousand, one hundred twenty".