121412451243 has 4 divisors (see below), whose sum is σ = 161883268328. Its totient is φ = 80941634160.

The previous prime is 121412451229. The next prime is 121412451253. The reversal of 121412451243 is 342154214121.

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

It is not a de Polignac number, because 121412451243 - 2¹⁰ = 121412450219 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 121412451243.

It is not an unprimeable number, because it can be changed into a prime (121412451203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20235408538 + ... + 20235408543.

It is an arithmetic number, because the mean of its divisors is an integer number (40470817082).

Almost surely, 2^121412451243 is an apocalyptic number.

121412451243 is a deficient number, since it is larger than the sum of its proper divisors (40470817085).

121412451243 is an equidigital number, since it uses as much as digits as its factorization.

121412451243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40470817084.

The product of its digits is 7680, while the sum is 30.

Adding to 121412451243 its reverse (342154214121), we get a palindrome (463566665364).

The spelling of 121412451243 in words is "one hundred twenty-one billion, four hundred twelve million, four hundred fifty-one thousand, two hundred forty-three".