121313442320 has 40 divisors (see below), whose sum is σ = 322347148224. Its totient is φ = 41593180032.

The previous prime is 121313442311. The next prime is 121313442347. The reversal of 121313442320 is 23244313121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 121313442320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108315014 + ... + 108316133.

Almost surely, 2^121313442320 is an apocalyptic number.

121313442320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121313442320 is an abundant number, since it is smaller than the sum of its proper divisors (201033705904).

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

121313442320 is a wasteful number, since it uses less digits than its factorization.

121313442320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216631167 (or 216631161 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 121313442320 its reverse (23244313121), we get a palindrome (144557755441).

The spelling of 121313442320 in words is "one hundred twenty-one billion, three hundred thirteen million, four hundred forty-two thousand, three hundred twenty".