121424240403 has 8 divisors (see below), whose sum is σ = 179887763600. Its totient is φ = 80949493584.

The previous prime is 121424240393. The next prime is 121424240429. The reversal of 121424240403 is 304042424121.

121424240403 is a `hidden beast` number, since 1 + 2 + 14 + 2 + 4 + 240 + 403 = 666.

It is not a de Polignac number, because 121424240403 - 2⁹ = 121424239891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4497194089 = 121424240403 / (1 + 2 + 1 + 4 + 2 + 4 + 2 + 4 + 0 + 4 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121424240303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2248597018 + ... + 2248597071.

It is an arithmetic number, because the mean of its divisors is an integer number (22485970450).

Almost surely, 2^121424240403 is an apocalyptic number.

121424240403 is a deficient number, since it is larger than the sum of its proper divisors (58463523197).

121424240403 is an equidigital number, since it uses as much as digits as its factorization.

121424240403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497194098 (or 4497194092 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 121424240403 its reverse (304042424121), we get a palindrome (425466664524).

The spelling of 121424240403 in words is "one hundred twenty-one billion, four hundred twenty-four million, two hundred forty thousand, four hundred three".