121241523 has 16 divisors (see below), whose sum is σ = 175208096. Its totient is φ = 74131200.

The previous prime is 121241513. The next prime is 121241543. The reversal of 121241523 is 325142121.

It is not a de Polignac number, because 121241523 - 2⁴ = 121241507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121241523.

It is not an unprimeable number, because it can be changed into a prime (121241513) 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, 3778 + ... + 16023.

It is an arithmetic number, because the mean of its divisors is an integer number (10950506).

Almost surely, 2^121241523 is an apocalyptic number.

121241523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121241523 is a deficient number, since it is larger than the sum of its proper divisors (53966573).

121241523 is a wasteful number, since it uses less digits than its factorization.

121241523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19974.

The product of its digits is 480, while the sum is 21.

The square root of 121241523 is about 11010.9728453030. The cubic root of 121241523 is about 494.9376148294.

Adding to 121241523 its reverse (325142121), we get a palindrome (446383644).

The spelling of 121241523 in words is "one hundred twenty-one million, two hundred forty-one thousand, five hundred twenty-three".