2021210202112 has 56 divisors (see below), whose sum is σ = 4046196339900. Its totient is φ = 1009599381504.

The previous prime is 2021210202091. The next prime is 2021210202113. The reversal of 2021210202112 is 2112020121202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1699748417536 + 321461784576 = 1303744^2 + 566976^2 .

It is a super-2 number, since 2×2021210202112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (2021210202113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8143464 + ... + 8387992.

Almost surely, 2^{2021210202112} 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 2021210202112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2023098169950).

2021210202112 is an abundant number, since it is smaller than the sum of its proper divisors (2024986137788).

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

2021210202112 is an equidigital number, since it uses as much as digits as its factorization.

2021210202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245564 (or 245540 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021210202112 its reverse (2112020121202), we get a palindrome (4133230323314).

The spelling of 2021210202112 in words is "two trillion, twenty-one billion, two hundred ten million, two hundred two thousand, one hundred twelve".