21536888812071 has 8 divisors (see below), whose sum is σ = 28753000331760. Its totient is φ = 14339351583552.

The previous prime is 21536888812069. The next prime is 21536888812073. The reversal of 21536888812071 is 17021888863512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21536888812069) and next prime (21536888812073).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21536888812071 - 2¹ = 21536888812069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21536888811996 and 21536888812014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21536888812073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4643570086 + ... + 4643574723.

It is an arithmetic number, because the mean of its divisors is an integer number (3594125041470).

Almost surely, 2^{21536888812071} is an apocalyptic number.

21536888812071 is a deficient number, since it is larger than the sum of its proper divisors (7216111519689).

21536888812071 is an equidigital number, since it uses as much as digits as its factorization.

21536888812071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9287145585.

The product of its (nonzero) digits is 10321920, while the sum is 60.

The spelling of 21536888812071 in words is "twenty-one trillion, five hundred thirty-six billion, eight hundred eighty-eight million, eight hundred twelve thousand, seventy-one".