2021208977982 has 32 divisors (see below), whose sum is σ = 4046345297280. Its totient is φ = 673082030880.

The previous prime is 2021208977947. The next prime is 2021208978017. The reversal of 2021208977982 is 2897798021202.

It is an interprime number because it is at equal distance from previous prime (2021208977947) and next prime (2021208978017).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33605757 + ... + 33665847.

It is an arithmetic number, because the mean of its divisors is an integer number (126448290540).

Almost surely, 2^{2021208977982} is an apocalyptic number.

2021208977982 is an abundant number, since it is smaller than the sum of its proper divisors (2025136319298).

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

2021208977982 is a wasteful number, since it uses less digits than its factorization.

2021208977982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65448.

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 2021208977982 in words is "two trillion, twenty-one billion, two hundred eight million, nine hundred seventy-seven thousand, nine hundred eighty-two".