121300213123 has 4 divisors (see below), whose sum is σ = 121302465520. Its totient is φ = 121297960728.

The previous prime is 121300213093. The next prime is 121300213141. The reversal of 121300213123 is 321312003121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121300213123 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 121300213123.

It is not an unprimeable number, because it can be changed into a prime (121300210123) 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, 1043388 + ... + 1153801.

It is an arithmetic number, because the mean of its divisors is an integer number (30325616380).

Almost surely, 2^121300213123 is an apocalyptic number.

121300213123 is a deficient number, since it is larger than the sum of its proper divisors (2252397).

121300213123 is an equidigital number, since it uses as much as digits as its factorization.

121300213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252396.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121300213123 its reverse (321312003121), we get a palindrome (442612216244).

The spelling of 121300213123 in words is "one hundred twenty-one billion, three hundred million, two hundred thirteen thousand, one hundred twenty-three".