21326112255 has 32 divisors (see below), whose sum is σ = 40254271488. Its totient is φ = 9434592000.

The previous prime is 21326112229. The next prime is 21326112289. The reversal of 21326112255 is 55221162312.

It is not a de Polignac number, because 21326112255 - 2⁹ = 21326111743 is a prime.

It is a super-2 number, since 2×21326112255² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3272646 + ... + 3279155.

It is an arithmetic number, because the mean of its divisors is an integer number (1257945984).

Almost surely, 2^21326112255 is an apocalyptic number.

21326112255 is a deficient number, since it is larger than the sum of its proper divisors (18928159233).

21326112255 is a wasteful number, since it uses less digits than its factorization.

21326112255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6551847.

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

Adding to 21326112255 its reverse (55221162312), we get a palindrome (76547274567).

The spelling of 21326112255 in words is "twenty-one billion, three hundred twenty-six million, one hundred twelve thousand, two hundred fifty-five".