121424102005 has 16 divisors (see below), whose sum is σ = 146692643760. Its totient is φ = 96485511168.

The previous prime is 121424102003. The next prime is 121424102021. The reversal of 121424102005 is 500201424121.

It can be written as a sum of positive squares in 8 ways, for example, as 3928030276 + 117496071729 = 62674^2 + 342777^2 .

It is a cyclic number.

It is not a de Polignac number, because 121424102005 - 2¹ = 121424102003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121424102003) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 349069 + ... + 603901.

It is an arithmetic number, because the mean of its divisors is an integer number (9168290235).

Almost surely, 2^121424102005 is an apocalyptic number.

It is an amenable number.

121424102005 is a deficient number, since it is larger than the sum of its proper divisors (25268541755).

121424102005 is a wasteful number, since it uses less digits than its factorization.

121424102005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255480.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 121424102005 its reverse (500201424121), we get a palindrome (621625526126).

The spelling of 121424102005 in words is "one hundred twenty-one billion, four hundred twenty-four million, one hundred two thousand, five".