121003020543 has 4 divisors (see below), whose sum is σ = 161337360728. Its totient is φ = 80668680360.

The previous prime is 121003020517. The next prime is 121003020547. The reversal of 121003020543 is 345020300121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121003020543 - 2⁹ = 121003020031 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 (121003020547) 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, 20167170088 + ... + 20167170093.

It is an arithmetic number, because the mean of its divisors is an integer number (40334340182).

Almost surely, 2^121003020543 is an apocalyptic number.

121003020543 is a deficient number, since it is larger than the sum of its proper divisors (40334340185).

121003020543 is an equidigital number, since it uses as much as digits as its factorization.

121003020543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40334340184.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 121003020543 its reverse (345020300121), we get a palindrome (466023320664).

The spelling of 121003020543 in words is "one hundred twenty-one billion, three million, twenty thousand, five hundred forty-three".