21112373671 has 2 divisors, whose sum is σ = 21112373672. Its totient is φ = 21112373670.

The previous prime is 21112373657. The next prime is 21112373677. The reversal of 21112373671 is 17637321112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112373671 - 2¹⁹ = 21111849383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112373677) by changing a digit.

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 as a sum of consecutive naturals, namely, 10556186835 + 10556186836.

It is an arithmetic number, because the mean of its divisors is an integer number (10556186836).

Almost surely, 2^21112373671 is an apocalyptic number.

21112373671 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112373671 is an equidigital number, since it uses as much as digits as its factorization.

21112373671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 34.

Adding to 21112373671 its reverse (17637321112), we get a palindrome (38749694783).

The spelling of 21112373671 in words is "twenty-one billion, one hundred twelve million, three hundred seventy-three thousand, six hundred seventy-one".