121303261 has 2 divisors, whose sum is σ = 121303262. Its totient is φ = 121303260.

The previous prime is 121303241. The next prime is 121303271. The reversal of 121303261 is 162303121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120340900 + 962361 = 10970^2 + 981^2 .

It is an emirp because it is prime and its reverse (162303121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121303261 is a prime.

It is a super-2 number, since 2×121303261² = 29428962258468242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121303241) 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, 60651630 + 60651631.

It is an arithmetic number, because the mean of its divisors is an integer number (60651631).

Almost surely, 2^121303261 is an apocalyptic number.

It is an amenable number.

121303261 is a deficient number, since it is larger than the sum of its proper divisors (1).

121303261 is an equidigital number, since it uses as much as digits as its factorization.

121303261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 121303261 is about 11013.7759646726. The cubic root of 121303261 is about 495.0216104567.

Adding to 121303261 its reverse (162303121), we get a palindrome (283606382).

The spelling of 121303261 in words is "one hundred twenty-one million, three hundred three thousand, two hundred sixty-one".