121755723223 has 2 divisors, whose sum is σ = 121755723224. Its totient is φ = 121755723222.

The previous prime is 121755723197. The next prime is 121755723247. The reversal of 121755723223 is 322327557121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121755723223 - 2⁵ = 121755723191 is a prime.

It is a super-2 number, since 2×121755723223² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121755723253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60877861611 + 60877861612.

It is an arithmetic number, because the mean of its divisors is an integer number (60877861612).

Almost surely, 2^121755723223 is an apocalyptic number.

121755723223 is a deficient number, since it is larger than the sum of its proper divisors (1).

121755723223 is an equidigital number, since it uses as much as digits as its factorization.

121755723223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 40.

The spelling of 121755723223 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred twenty-three thousand, two hundred twenty-three".