26610340121 has 2 divisors, whose sum is σ = 26610340122. Its totient is φ = 26610340120.

The previous prime is 26610340087. The next prime is 26610340147. The reversal of 26610340121 is 12104301662.

It is an a-pointer prime, because the next prime (26610340147) can be obtained adding 26610340121 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14370015625 + 12240324496 = 119875^2 + 110636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26610340121 is a prime.

It is a super-2 number, since 2×26610340121² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26610340321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13305170060 + 13305170061.

It is an arithmetic number, because the mean of its divisors is an integer number (13305170061).

Almost surely, 2^26610340121 is an apocalyptic number.

It is an amenable number.

26610340121 is a deficient number, since it is larger than the sum of its proper divisors (1).

26610340121 is an equidigital number, since it uses as much as digits as its factorization.

26610340121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 26610340121 its reverse (12104301662), we get a palindrome (38714641783).

The spelling of 26610340121 in words is "twenty-six billion, six hundred ten million, three hundred forty thousand, one hundred twenty-one".