2121669569 has 8 divisors (see below), whose sum is σ = 2222092032. Its totient is φ = 2021928480.

The previous prime is 2121669533. The next prime is 2121669587. The reversal of 2121669569 is 9659661212.

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 2121669569 - 2⁸ = 2121669313 is a prime.

It is a super-2 number, since 2×2121669569² = 9002963520041291522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121663569) 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, 163964 + ... + 176429.

It is an arithmetic number, because the mean of its divisors is an integer number (277761504).

Almost surely, 2^2121669569 is an apocalyptic number.

It is an amenable number.

2121669569 is a deficient number, since it is larger than the sum of its proper divisors (100422463).

2121669569 is a wasteful number, since it uses less digits than its factorization.

2121669569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340687.

The product of its digits is 349920, while the sum is 47.

The square root of 2121669569 is about 46061.5845255024. The cubic root of 2121669569 is about 1284.9687989719.

The spelling of 2121669569 in words is "two billion, one hundred twenty-one million, six hundred sixty-nine thousand, five hundred sixty-nine".