121320311332005 has 24 divisors (see below), whose sum is σ = 210290233750272. Its totient is φ = 64703644779744.

The previous prime is 121320311331899. The next prime is 121320311332013. The reversal of 121320311332005 is 500233113023121.

121320311332005 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 20 + 311 + 3 + 320 + 0 + 5 = 666.

It is not a de Polignac number, because 121320311332005 - 2¹² = 121320311327909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121320311332005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5179129 + ... + 16415358.

It is an arithmetic number, because the mean of its divisors is an integer number (8762093072928).

Almost surely, 2^{121320311332005} is an apocalyptic number.

121320311332005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121320311332005 is a deficient number, since it is larger than the sum of its proper divisors (88969922418267).

121320311332005 is a wasteful number, since it uses less digits than its factorization.

121320311332005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21719345 (or 21719342 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 121320311332005 its reverse (500233113023121), we get a palindrome (621553424355126).

The spelling of 121320311332005 in words is "one hundred twenty-one trillion, three hundred twenty billion, three hundred eleven million, three hundred thirty-two thousand, five".