121320352005 has 32 divisors (see below), whose sum is σ = 198665381376. Its totient is φ = 63187166784.

The previous prime is 121320351991. The next prime is 121320352039. The reversal of 121320352005 is 500253023121.

It is a happy number.

It is not a de Polignac number, because 121320352005 - 2⁵ = 121320351973 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 3985774 + ... + 4016096.

It is an arithmetic number, because the mean of its divisors is an integer number (6208293168).

Almost surely, 2^121320352005 is an apocalyptic number.

121320352005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121320352005 is a deficient number, since it is larger than the sum of its proper divisors (77345029371).

121320352005 is a wasteful number, since it uses less digits than its factorization.

121320352005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36577.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 121320352005 its reverse (500253023121), we get a palindrome (621573375126).

The spelling of 121320352005 in words is "one hundred twenty-one billion, three hundred twenty million, three hundred fifty-two thousand, five".