121242331013 has 4 divisors (see below), whose sum is σ = 121558891008. Its totient is φ = 120925771020.

The previous prime is 121242330973. The next prime is 121242331033. The reversal of 121242331013 is 310133242121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121242331013 - 2¹² = 121242326917 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 121242331013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121242331033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158279423 + ... + 158280188.

It is an arithmetic number, because the mean of its divisors is an integer number (30389722752).

Almost surely, 2^121242331013 is an apocalyptic number.

It is an amenable number.

121242331013 is a deficient number, since it is larger than the sum of its proper divisors (316559995).

121242331013 is an equidigital number, since it uses as much as digits as its factorization.

121242331013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316559994.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 121242331013 its reverse (310133242121), we get a palindrome (431375573134).

The spelling of 121242331013 in words is "one hundred twenty-one billion, two hundred forty-two million, three hundred thirty-one thousand, thirteen".