2021107812 has 12 divisors (see below), whose sum is σ = 4715918256. Its totient is φ = 673702600.

The previous prime is 2021107807. The next prime is 2021107813. The reversal of 2021107812 is 2187011202.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (2021107813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84212814 + ... + 84212837.

It is an arithmetic number, because the mean of its divisors is an integer number (392993188).

Almost surely, 2^2021107812 is an apocalyptic number.

It is an amenable number.

2021107812 is an abundant number, since it is smaller than the sum of its proper divisors (2694810444).

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

2021107812 is a wasteful number, since it uses less digits than its factorization.

2021107812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168425658 (or 168425656 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 2021107812 is about 44956.7326659756. The cubic root of 2021107812 is about 1264.3379105448.

The spelling of 2021107812 in words is "two billion, twenty-one million, one hundred seven thousand, eight hundred twelve".