121315505 has 16 divisors (see below), whose sum is σ = 148824000. Its totient is φ = 94906560.

The previous prime is 121315487. The next prime is 121315511. The reversal of 121315505 is 505513121.

It is a happy number.

It is not a de Polignac number, because 121315505 - 2¹⁴ = 121299121 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61271 + ... + 63219.

It is an arithmetic number, because the mean of its divisors is an integer number (9301500).

Almost surely, 2^121315505 is an apocalyptic number.

It is an amenable number.

121315505 is a deficient number, since it is larger than the sum of its proper divisors (27508495).

121315505 is a wasteful number, since it uses less digits than its factorization.

121315505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 121315505 is about 11014.3317999777. The cubic root of 121315505 is about 495.0382652458.

Adding to 121315505 its reverse (505513121), we get a palindrome (626828626).

The spelling of 121315505 in words is "one hundred twenty-one million, three hundred fifteen thousand, five hundred five".