26312242221 has 6 divisors (see below), whose sum is σ = 38006572110. Its totient is φ = 17541494808.

The previous prime is 26312242189. The next prime is 26312242247. The reversal of 26312242221 is 12224221362.

26312242221 is a `hidden beast` number, since 2 + 631 + 2 + 2 + 4 + 2 + 2 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23606786025 + 2705456196 = 153645^2 + 52014^2 .

It is not a de Polignac number, because 26312242221 - 2⁵ = 26312242189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26312249221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1461791226 + ... + 1461791243.

It is an arithmetic number, because the mean of its divisors is an integer number (6334428685).

Almost surely, 2^26312242221 is an apocalyptic number.

It is an amenable number.

26312242221 is a deficient number, since it is larger than the sum of its proper divisors (11694329889).

26312242221 is a wasteful number, since it uses less digits than its factorization.

26312242221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923582475 (or 2923582472 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 26312242221 its reverse (12224221362), we get a palindrome (38536463583).

The spelling of 26312242221 in words is "twenty-six billion, three hundred twelve million, two hundred forty-two thousand, two hundred twenty-one".