26300001221 has 12 divisors (see below), whose sum is σ = 28945574820. Its totient is φ = 23878932480.

The previous prime is 26300001193. The next prime is 26300001239. The reversal of 26300001221 is 12210000362.

It can be written as a sum of positive squares in 6 ways, for example, as 17818512196 + 8481489025 = 133486^2 + 92095^2 .

It is not a de Polignac number, because 26300001221 - 2¹⁰ = 26300000197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26300001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26300006221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1265276 + ... + 1285893.

It is an arithmetic number, because the mean of its divisors is an integer number (2412131235).

Almost surely, 2^26300001221 is an apocalyptic number.

It is an amenable number.

26300001221 is a deficient number, since it is larger than the sum of its proper divisors (2645573599).

26300001221 is a wasteful number, since it uses less digits than its factorization.

26300001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551256 (or 2551243 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 26300001221 its reverse (12210000362), we get a palindrome (38510001583).

The spelling of 26300001221 in words is "twenty-six billion, three hundred million, one thousand, two hundred twenty-one".