2021101312212 has 120 divisors (see below), whose sum is σ = 5346027890280. Its totient is φ = 665743795200.

The previous prime is 2021101312159. The next prime is 2021101312393. The reversal of 2021101312212 is 2122131011202.

2021101312212 is a `hidden beast` number, since 20 + 21 + 101 + 312 + 212 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 83754675216 + 1937346636996 = 289404^2 + 1391886^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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 39 ways as a sum of consecutive naturals, for example, 51914178 + ... + 51953094.

It is an arithmetic number, because the mean of its divisors is an integer number (44550232419).

Almost surely, 2^{2021101312212} 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 2021101312212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2673013945140).

2021101312212 is an abundant number, since it is smaller than the sum of its proper divisors (3324926578068).

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

2021101312212 is a wasteful number, since it uses less digits than its factorization.

2021101312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40823 (or 40812 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2021101312212 its reverse (2122131011202), we get a palindrome (4143232323414).

The spelling of 2021101312212 in words is "two trillion, twenty-one billion, one hundred one million, three hundred twelve thousand, two hundred twelve".