121317723 has 16 divisors (see below), whose sum is σ = 180022560. Its totient is φ = 80746848.

The previous prime is 121317673. The next prime is 121317731. The reversal of 121317723 is 327713121.

It is not a de Polignac number, because 121317723 - 2¹⁸ = 121055579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121317733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14961 + ... + 21597.

It is an arithmetic number, because the mean of its divisors is an integer number (11251410).

Almost surely, 2^121317723 is an apocalyptic number.

121317723 is a deficient number, since it is larger than the sum of its proper divisors (58704837).

121317723 is an equidigital number, since it uses as much as digits as its factorization.

121317723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7323 (or 7317 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 121317723 is about 11014.4324865151. The cubic root of 121317723 is about 495.0412821401.

It can be divided in two parts, 121 and 317723, that multiplied together give a palindrome (38444483).

The spelling of 121317723 in words is "one hundred twenty-one million, three hundred seventeen thousand, seven hundred twenty-three".