121434340223 has 8 divisors (see below), whose sum is σ = 138821148192. Its totient is φ = 104057293536.

The previous prime is 121434340201. The next prime is 121434340267. The reversal of 121434340223 is 322043434121.

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

It is a de Polignac number, because none of the positive numbers 2^k-121434340223 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 (121434340123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2413640 + ... + 2463437.

It is an arithmetic number, because the mean of its divisors is an integer number (17352643524).

Almost surely, 2^121434340223 is an apocalyptic number.

121434340223 is a deficient number, since it is larger than the sum of its proper divisors (17386807969).

121434340223 is an equidigital number, since it uses as much as digits as its factorization.

121434340223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4880641.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 121434340223 its reverse (322043434121), we get a palindrome (443477774344).

The spelling of 121434340223 in words is "one hundred twenty-one billion, four hundred thirty-four million, three hundred forty thousand, two hundred twenty-three".