2021111010112 has 84 divisors (see below), whose sum is σ = 4202312618980. Its totient is φ = 964378939392.

The previous prime is 2021111010109. The next prime is 2021111010137. The reversal of 2021111010112 is 2110101111202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 133938432576 + 1887172577536 = 365976^2 + 1373744^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021111010092 and 2021111010101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14590714 + ... + 14728582.

Almost surely, 2^{2021111010112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021111010112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2101156309490).

2021111010112 is an abundant number, since it is smaller than the sum of its proper divisors (2181201608868).

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

2021111010112 is a wasteful number, since it uses less digits than its factorization.

2021111010112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138360 (or 138327 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2021111010112 its reverse (2110101111202), we get a palindrome (4131212121314).

The spelling of 2021111010112 in words is "two trillion, twenty-one billion, one hundred eleven million, ten thousand, one hundred twelve".