121315310506 has 24 divisors (see below), whose sum is σ = 197082128160. Its totient is φ = 55981884816.

The previous prime is 121315310453. The next prime is 121315310507. The reversal of 121315310506 is 605013513121.

It is not an unprimeable number, because it can be changed into a prime (121315310507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2121121 + ... + 2177563.

It is an arithmetic number, because the mean of its divisors is an integer number (8211755340).

Almost surely, 2^121315310506 is an apocalyptic number.

121315310506 is a deficient number, since it is larger than the sum of its proper divisors (75766817654).

121315310506 is a wasteful number, since it uses less digits than its factorization.

121315310506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62830 (or 62817 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

Adding to 121315310506 its reverse (605013513121), we get a palindrome (726328823627).

The spelling of 121315310506 in words is "one hundred twenty-one billion, three hundred fifteen million, three hundred ten thousand, five hundred six".