121003321543 has 8 divisors (see below), whose sum is σ = 134514859136. Its totient is φ = 108092296800.

The previous prime is 121003321513. The next prime is 121003321553. The reversal of 121003321543 is 345123300121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121003321543 - 2²⁵ = 120969767111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121003321513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150127788 + ... + 150128593.

It is an arithmetic number, because the mean of its divisors is an integer number (16814357392).

Almost surely, 2^121003321543 is an apocalyptic number.

121003321543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121003321543 is a deficient number, since it is larger than the sum of its proper divisors (13511537593).

121003321543 is a wasteful number, since it uses less digits than its factorization.

121003321543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300256425.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 121003321543 its reverse (345123300121), we get a palindrome (466126621664).

The spelling of 121003321543 in words is "one hundred twenty-one billion, three million, three hundred twenty-one thousand, five hundred forty-three".