2021111219999 has 4 divisors (see below), whose sum is σ = 2086308356160. Its totient is φ = 1955914083840.

The previous prime is 2021111219951. The next prime is 2021111220013. The reversal of 2021111219999 is 9999121111202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021111219999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111219929) 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, 32598568034 + ... + 32598568095.

It is an arithmetic number, because the mean of its divisors is an integer number (521577089040).

Almost surely, 2^{2021111219999} is an apocalyptic number.

2021111219999 is a deficient number, since it is larger than the sum of its proper divisors (65197136161).

2021111219999 is an equidigital number, since it uses as much as digits as its factorization.

2021111219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65197136160.

The product of its (nonzero) digits is 52488, while the sum is 47.

The spelling of 2021111219999 in words is "two trillion, twenty-one billion, one hundred eleven million, two hundred nineteen thousand, nine hundred ninety-nine".