121318005 has 16 divisors (see below), whose sum is σ = 199355904. Its totient is φ = 62953920.

The previous prime is 121318003. The next prime is 121318013. The reversal of 121318005 is 500813121.

It is not a de Polignac number, because 121318005 - 2¹ = 121318003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121318003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108741 + ... + 109850.

It is an arithmetic number, because the mean of its divisors is an integer number (12459744).

Almost surely, 2^121318005 is an apocalyptic number.

121318005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121318005 is a deficient number, since it is larger than the sum of its proper divisors (78037899).

121318005 is a wasteful number, since it uses less digits than its factorization.

121318005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218636.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 121318005 is about 11014.4452878935. The cubic root of 121318005 is about 495.0416657102.

The spelling of 121318005 in words is "one hundred twenty-one million, three hundred eighteen thousand, five".