121512303340 has 24 divisors (see below), whose sum is σ = 255247685280. Its totient is φ = 48591235968.

The previous prime is 121512303323. The next prime is 121512303347. The reversal of 121512303340 is 43303215121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121512303347) 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 7 ways as a sum of consecutive naturals, for example, 782377 + ... + 924736.

It is an arithmetic number, because the mean of its divisors is an integer number (10635320220).

Almost surely, 2^121512303340 is an apocalyptic number.

121512303340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121512303340 is an abundant number, since it is smaller than the sum of its proper divisors (133735381940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121512303340 is a wasteful number, since it uses less digits than its factorization.

121512303340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710681 (or 1710679 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 121512303340 its reverse (43303215121), we get a palindrome (164815518461).

The spelling of 121512303340 in words is "one hundred twenty-one billion, five hundred twelve million, three hundred three thousand, three hundred forty".