121302005 has 16 divisors (see below), whose sum is σ = 159136704. Its totient is φ = 88030080.

The previous prime is 121301989. The next prime is 121302019. The reversal of 121302005 is 500203121.

It is a happy number.

It is not a de Polignac number, because 121302005 - 2⁴ = 121301989 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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26657 + ... + 30873.

It is an arithmetic number, because the mean of its divisors is an integer number (9946044).

Almost surely, 2^121302005 is an apocalyptic number.

It is an amenable number.

121302005 is a deficient number, since it is larger than the sum of its proper divisors (37834699).

121302005 is a wasteful number, since it uses less digits than its factorization.

121302005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 121302005 is about 11013.7189450249. The cubic root of 121302005 is about 495.0199019308.

Adding to 121302005 its reverse (500203121), we get a palindrome (621505126).

The spelling of 121302005 in words is "one hundred twenty-one million, three hundred two thousand, five".