21355473044271 has 8 divisors (see below), whose sum is σ = 28755884495664. Its totient is φ = 14096021811200.

The previous prime is 21355473044267. The next prime is 21355473044287. The reversal of 21355473044271 is 17244037455312.

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

It is a cyclic number.

It is not a de Polignac number, because 21355473044271 - 2² = 21355473044267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21355473044271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21355473044261) 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, 35240054226 + ... + 35240054831.

It is an arithmetic number, because the mean of its divisors is an integer number (3594485561958).

Almost surely, 2^{21355473044271} is an apocalyptic number.

21355473044271 is a deficient number, since it is larger than the sum of its proper divisors (7400411451393).

21355473044271 is a wasteful number, since it uses less digits than its factorization.

21355473044271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70480109161.

The product of its (nonzero) digits is 2822400, while the sum is 48.

The spelling of 21355473044271 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred seventy-three million, forty-four thousand, two hundred seventy-one".