121266623 has 2 divisors, whose sum is σ = 121266624.
Its totient is φ = 121266622.
The previous prime is 121266617. The next prime is 121266641. The reversal of 121266623 is 326662121.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 121266623 - 212 = 121262527 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (121266323) 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, 60633311 + 60633312.
It is an arithmetic number, because the mean of its divisors is an integer number (60633312).
Almost surely, 2121266623 is an apocalyptic number.
121266623 is a deficient number, since it is larger than the sum of its proper divisors (1).
121266623 is an equidigital number, since it uses as much as digits as its factorization.
121266623 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 5184, while the sum is 29.
The square root of 121266623 is about 11012.1125584513.
The cubic root of 121266623 is about 494.9717672569.
The spelling of 121266623 in words is "one hundred twenty-one million, two hundred sixty-six thousand, six hundred twenty-three".