26251121201 has 2 divisors, whose sum is σ = 26251121202. Its totient is φ = 26251121200.

The previous prime is 26251121177. The next prime is 26251121203. The reversal of 26251121201 is 10212115262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25423983601 + 827137600 = 159449^2 + 28760^2 .

It is a cyclic number.

It is not a de Polignac number, because 26251121201 - 2³⁴ = 9071252017 is a prime.

Together with 26251121203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26251121203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13125560600 + 13125560601.

It is an arithmetic number, because the mean of its divisors is an integer number (13125560601).

Almost surely, 2^26251121201 is an apocalyptic number.

It is an amenable number.

26251121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

26251121201 is an equidigital number, since it uses as much as digits as its factorization.

26251121201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 26251121201 its reverse (10212115262), we get a palindrome (36463236463).

The spelling of 26251121201 in words is "twenty-six billion, two hundred fifty-one million, one hundred twenty-one thousand, two hundred one".