2021111008 has 24 divisors (see below), whose sum is σ = 4547500272. Its totient is φ = 866190336.

The previous prime is 2021110981. The next prime is 2021111041. The reversal of 2021111008 is 8001111202.

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

It is a junction number, because it is equal to n+sod(n) for n = 2021110982 and 2021111000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4511185 + ... + 4511632.

It is an arithmetic number, because the mean of its divisors is an integer number (189479178).

Almost surely, 2^2021111008 is an apocalyptic number.

2021111008 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2021111008 is an abundant number, since it is smaller than the sum of its proper divisors (2526389264).

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

2021111008 is an equidigital number, since it uses as much as digits as its factorization.

2021111008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9022834 (or 9022826 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 2021111008 is about 44956.7682112493. The cubic root of 2021111008 is about 1264.3385769816.

The spelling of 2021111008 in words is "two billion, twenty-one million, one hundred eleven thousand, eight".