121315122455 has 16 divisors (see below), whose sum is σ = 153250838400. Its totient is φ = 91937682720.

The previous prime is 121315122451. The next prime is 121315122463. The reversal of 121315122455 is 554221513121.

It is not a de Polignac number, because 121315122455 - 2² = 121315122451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121315122451) 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 15 ways as a sum of consecutive naturals, for example, 1671716 + ... + 1742774.

It is an arithmetic number, because the mean of its divisors is an integer number (9578177400).

Almost surely, 2^121315122455 is an apocalyptic number.

121315122455 is a deficient number, since it is larger than the sum of its proper divisors (31935715945).

121315122455 is a wasteful number, since it uses less digits than its factorization.

121315122455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89054.

The product of its digits is 12000, while the sum is 32.

Adding to 121315122455 its reverse (554221513121), we get a palindrome (675536635576).

The spelling of 121315122455 in words is "one hundred twenty-one billion, three hundred fifteen million, one hundred twenty-two thousand, four hundred fifty-five".