2021100100219 has 2 divisors, whose sum is σ = 2021100100220. Its totient is φ = 2021100100218.

The previous prime is 2021100100199. The next prime is 2021100100231. The reversal of 2021100100219 is 9120010011202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021100100219 is a prime.

It is a super-2 number, since 2×2021100100219² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021100100196 and 2021100100205.

It is not a weakly prime, because it can be changed into another prime (2021100100319) by changing a digit.

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 as a sum of consecutive naturals, namely, 1010550050109 + 1010550050110.

It is an arithmetic number, because the mean of its divisors is an integer number (1010550050110).

Almost surely, 2^{2021100100219} is an apocalyptic number.

2021100100219 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021100100219 is an equidigital number, since it uses as much as digits as its factorization.

2021100100219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 2021100100219 in words is "two trillion, twenty-one billion, one hundred million, one hundred thousand, two hundred nineteen".