121315332516 has 48 divisors (see below), whose sum is σ = 323525919360. Its totient is φ = 34659555840.

The previous prime is 121315332499. The next prime is 121315332517. The reversal of 121315332516 is 615233513121.

It is not an unprimeable number, because it can be changed into a prime (121315332517) 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 15 ways as a sum of consecutive naturals, for example, 2123980 + ... + 2180348.

It is an arithmetic number, because the mean of its divisors is an integer number (6740123320).

Almost surely, 2^121315332516 is an apocalyptic number.

It is an amenable number.

121315332516 is an abundant number, since it is smaller than the sum of its proper divisors (202210586844).

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

121315332516 is a wasteful number, since it uses less digits than its factorization.

121315332516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82004 (or 82002 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

Adding to 121315332516 its reverse (615233513121), we get a palindrome (736548845637).

The spelling of 121315332516 in words is "one hundred twenty-one billion, three hundred fifteen million, three hundred thirty-two thousand, five hundred sixteen".