12121443101005 has 32 divisors (see below), whose sum is σ = 17606509214976. Its totient is φ = 7820713872384.

The previous prime is 12121443100979. The next prime is 12121443101017. The reversal of 12121443101005 is 50010134412121.

It is a happy number.

It is not a de Polignac number, because 12121443101005 - 2⁹ = 12121443100493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 747259 + ... + 4980088.

It is an arithmetic number, because the mean of its divisors is an integer number (550203412968).

Almost surely, 2^{12121443101005} is an apocalyptic number.

It is an amenable number.

12121443101005 is a deficient number, since it is larger than the sum of its proper divisors (5485066113971).

12121443101005 is a wasteful number, since it uses less digits than its factorization.

12121443101005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5730933.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 12121443101005 its reverse (50010134412121), we get a palindrome (62131577513126).

The spelling of 12121443101005 in words is "twelve trillion, one hundred twenty-one billion, four hundred forty-three million, one hundred one thousand, five".