2115505121 has 8 divisors (see below), whose sum is σ = 2162184000. Its totient is φ = 2069187120.

The previous prime is 2115505097. The next prime is 2115505127. The reversal of 2115505121 is 1215055112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2115505121 - 2¹⁴ = 2115488737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115505127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78350 + ... + 101831.

It is an arithmetic number, because the mean of its divisors is an integer number (270273000).

Almost surely, 2^2115505121 is an apocalyptic number.

It is an amenable number.

2115505121 is a deficient number, since it is larger than the sum of its proper divisors (46678879).

2115505121 is a wasteful number, since it uses less digits than its factorization.

2115505121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180439.

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 2115505121 is about 45994.6205658879. The cubic root of 2115505121 is about 1283.7231121795.

The spelling of 2115505121 in words is "two billion, one hundred fifteen million, five hundred five thousand, one hundred twenty-one".