121325261 has 2 divisors, whose sum is σ = 121325262. Its totient is φ = 121325260.

The previous prime is 121325251. The next prime is 121325263. The reversal of 121325261 is 162523121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64096036 + 57229225 = 8006^2 + 7565^2 .

It is an emirp because it is prime and its reverse (162523121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121325261 is a prime.

Together with 121325263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121325263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60662630 + 60662631.

It is an arithmetic number, because the mean of its divisors is an integer number (60662631).

Almost surely, 2^121325261 is an apocalyptic number.

It is an amenable number.

121325261 is a deficient number, since it is larger than the sum of its proper divisors (1).

121325261 is an equidigital number, since it uses as much as digits as its factorization.

121325261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 121325261 is about 11014.7746685985. The cubic root of 121325261 is about 495.0515349535.

Adding to 121325261 its reverse (162523121), we get a palindrome (283848382).

The spelling of 121325261 in words is "one hundred twenty-one million, three hundred twenty-five thousand, two hundred sixty-one".