121232331403 has 4 divisors (see below), whose sum is σ = 122594492520. Its totient is φ = 119870170288.

The previous prime is 121232331397. The next prime is 121232331433. The reversal of 121232331403 is 304133232121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304133232121 = 71563 ⋅4249867.

It is a cyclic number.

It is not a de Polignac number, because 121232331403 - 2¹³ = 121232323211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121232331433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681080425 + ... + 681080602.

It is an arithmetic number, because the mean of its divisors is an integer number (30648623130).

Almost surely, 2^121232331403 is an apocalyptic number.

121232331403 is a deficient number, since it is larger than the sum of its proper divisors (1362161117).

121232331403 is an equidigital number, since it uses as much as digits as its factorization.

121232331403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362161116.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 121232331403 its reverse (304133232121), we get a palindrome (425365563524).

The spelling of 121232331403 in words is "one hundred twenty-one billion, two hundred thirty-two million, three hundred thirty-one thousand, four hundred three".