21112019476871 has 2 divisors, whose sum is σ = 21112019476872. Its totient is φ = 21112019476870.

The previous prime is 21112019476841. The next prime is 21112019476879. The reversal of 21112019476871 is 17867491021112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112019476871 - 2³⁴ = 21094839607687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112019476879) 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, 10556009738435 + 10556009738436.

It is an arithmetic number, because the mean of its divisors is an integer number (10556009738436).

Almost surely, 2^{21112019476871} is an apocalyptic number.

21112019476871 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112019476871 is an equidigital number, since it uses as much as digits as its factorization.

21112019476871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 50.

The spelling of 21112019476871 in words is "twenty-one trillion, one hundred twelve billion, nineteen million, four hundred seventy-six thousand, eight hundred seventy-one".