21270218282255 has 8 divisors (see below), whose sum is σ = 25565900216352. Its totient is φ = 16988415774048.

The previous prime is 21270218282233. The next prime is 21270218282279. The reversal of 21270218282255 is 55228281207212.

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 21270218282255 - 2¹⁴ = 21270218265871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 3469853099 + ... + 3469859228.

It is an arithmetic number, because the mean of its divisors is an integer number (3195737527044).

Almost surely, 2^{21270218282255} is an apocalyptic number.

21270218282255 is a deficient number, since it is larger than the sum of its proper divisors (4295681934097).

21270218282255 is an equidigital number, since it uses as much as digits as its factorization.

21270218282255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6939712945.

The product of its (nonzero) digits is 716800, while the sum is 47.

Adding to 21270218282255 its reverse (55228281207212), we get a palindrome (76498499489467).

The spelling of 21270218282255 in words is "twenty-one trillion, two hundred seventy billion, two hundred eighteen million, two hundred eighty-two thousand, two hundred fifty-five".