121115005 has 16 divisors (see below), whose sum is σ = 161927424. Its totient is φ = 86207680.

The previous prime is 121115003. The next prime is 121115041. The reversal of 121115005 is 500511121.

It is not a de Polignac number, because 121115005 - 2¹ = 121115003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121115005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121115003) 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, 20842 + ... + 26011.

It is an arithmetic number, because the mean of its divisors is an integer number (10120464).

Almost surely, 2^121115005 is an apocalyptic number.

It is an amenable number.

121115005 is a deficient number, since it is larger than the sum of its proper divisors (40812419).

121115005 is a wasteful number, since it uses less digits than its factorization.

121115005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46916.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 121115005 is about 11005.2262584647. The cubic root of 121115005 is about 494.7653957484.

Adding to 121115005 its reverse (500511121), we get a palindrome (621626126).

It can be divided in two parts, 12111 and 5005, that multiplied together give a triangular number (60615555 = T₁₁₀₁₀).

The spelling of 121115005 in words is "one hundred twenty-one million, one hundred fifteen thousand, five".