21326210001255 has 64 divisors (see below), whose sum is σ = 35543474933760. Its totient is φ = 10906866432000.

The previous prime is 21326210001253. The next prime is 21326210001319. The reversal of 21326210001255 is 55210001262312.

It is not a de Polignac number, because 21326210001255 - 2¹ = 21326210001253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21326210001253) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 212809701 + ... + 212909889.

It is an arithmetic number, because the mean of its divisors is an integer number (555366795840).

Almost surely, 2^{21326210001255} is an apocalyptic number.

21326210001255 is a deficient number, since it is larger than the sum of its proper divisors (14217264932505).

21326210001255 is a wasteful number, since it uses less digits than its factorization.

21326210001255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104392.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 21326210001255 its reverse (55210001262312), we get a palindrome (76536211263567).

The spelling of 21326210001255 in words is "twenty-one trillion, three hundred twenty-six billion, two hundred ten million, one thousand, two hundred fifty-five".