121302142440323 has 4 divisors (see below), whose sum is σ = 130633076474208. Its totient is φ = 111971208406440.

The previous prime is 121302142440319. The next prime is 121302142440343. The reversal of 121302142440323 is 323044241203121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121302142440323 - 2² = 121302142440319 is a prime.

It is a super-2 number, since 2×121302142440323² (a number of 29 digits) contains 22 as substring.

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 121302142440323.

It is not an unprimeable number, because it can be changed into a prime (121302142440343) 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, 4665467016923 + ... + 4665467016948.

It is an arithmetic number, because the mean of its divisors is an integer number (32658269118552).

Almost surely, 2^{121302142440323} is an apocalyptic number.

121302142440323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121302142440323 is a deficient number, since it is larger than the sum of its proper divisors (9330934033885).

121302142440323 is an equidigital number, since it uses as much as digits as its factorization.

121302142440323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9330934033884.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 121302142440323 its reverse (323044241203121), we get a palindrome (444346383643444).

The spelling of 121302142440323 in words is "one hundred twenty-one trillion, three hundred two billion, one hundred forty-two million, four hundred forty thousand, three hundred twenty-three".