26215413121 has 2 divisors, whose sum is σ = 26215413122. Its totient is φ = 26215413120.

The previous prime is 26215413101. The next prime is 26215413137. The reversal of 26215413121 is 12131451262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24492250000 + 1723163121 = 156500^2 + 41511^2 .

It is a cyclic number.

It is not a de Polignac number, because 26215413121 - 2¹¹ = 26215411073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26215413121.

It is not a weakly prime, because it can be changed into another prime (26215413101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13107706560 + 13107706561.

It is an arithmetic number, because the mean of its divisors is an integer number (13107706561).

Almost surely, 2^26215413121 is an apocalyptic number.

It is an amenable number.

26215413121 is a deficient number, since it is larger than the sum of its proper divisors (1).

26215413121 is an equidigital number, since it uses as much as digits as its factorization.

26215413121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

Adding to 26215413121 its reverse (12131451262), we get a palindrome (38346864383).

The spelling of 26215413121 in words is "twenty-six billion, two hundred fifteen million, four hundred thirteen thousand, one hundred twenty-one".