2117344221 has 12 divisors (see below), whose sum is σ = 3108524380. Its totient is φ = 1388422080.

The previous prime is 2117344217. The next prime is 2117344231. The reversal of 2117344221 is 1224437112.

2117344221 is a `hidden beast` number, since 211 + 7 + 3 + 442 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1117899225 + 999444996 = 33435^2 + 31614^2 .

It is not a de Polignac number, because 2117344221 - 2² = 2117344217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117344231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1927816 + ... + 1928913.

Almost surely, 2^2117344221 is an apocalyptic number.

It is an amenable number.

2117344221 is a deficient number, since it is larger than the sum of its proper divisors (991180159).

2117344221 is a wasteful number, since it uses less digits than its factorization.

2117344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856796 (or 3856793 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2117344221 is about 46014.6087780826. The cubic root of 2117344221 is about 1284.0950030879.

The spelling of 2117344221 in words is "two billion, one hundred seventeen million, three hundred forty-four thousand, two hundred twenty-one".