2166570570121 has 16 divisors (see below), whose sum is σ = 2190715365376. Its totient is φ = 2142567450000.

The previous prime is 2166570570113. The next prime is 2166570570137. The reversal of 2166570570121 is 1210750756612.

It is a cyclic number.

It is not a de Polignac number, because 2166570570121 - 2³ = 2166570570113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166570570221) 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, 52808506 + ... + 52849516.

It is an arithmetic number, because the mean of its divisors is an integer number (136919710336).

Almost surely, 2^{2166570570121} is an apocalyptic number.

It is an amenable number.

2166570570121 is a deficient number, since it is larger than the sum of its proper divisors (24144795255).

2166570570121 is a wasteful number, since it uses less digits than its factorization.

2166570570121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42724.

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 2166570570121 in words is "two trillion, one hundred sixty-six billion, five hundred seventy million, five hundred seventy thousand, one hundred twenty-one".