121545311 has 2 divisors, whose sum is σ = 121545312. Its totient is φ = 121545310.

The previous prime is 121545289. The next prime is 121545329. The reversal of 121545311 is 113545121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121545311 - 2¹⁸ = 121283167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121545211) 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, 60772655 + 60772656.

It is an arithmetic number, because the mean of its divisors is an integer number (60772656).

Almost surely, 2^121545311 is an apocalyptic number.

121545311 is a deficient number, since it is larger than the sum of its proper divisors (1).

121545311 is an equidigital number, since it uses as much as digits as its factorization.

121545311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 23.

The square root of 121545311 is about 11024.7589996335. The cubic root of 121545311 is about 495.3506490753.

The spelling of 121545311 in words is "one hundred twenty-one million, five hundred forty-five thousand, three hundred eleven".