2117204405117 has 4 divisors (see below), whose sum is σ = 2117541170496. Its totient is φ = 2116867639740.

The previous prime is 2117204405101. The next prime is 2117204405159. The reversal of 2117204405117 is 7115044027112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2117204405117 - 2⁴ = 2117204405101 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 (2117204405177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168373259 + ... + 168385832.

It is an arithmetic number, because the mean of its divisors is an integer number (529385292624).

Almost surely, 2^{2117204405117} is an apocalyptic number.

It is an amenable number.

2117204405117 is a deficient number, since it is larger than the sum of its proper divisors (336765379).

2117204405117 is an equidigital number, since it uses as much as digits as its factorization.

2117204405117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336765378.

The product of its (nonzero) digits is 15680, while the sum is 35.

The spelling of 2117204405117 in words is "two trillion, one hundred seventeen billion, two hundred four million, four hundred five thousand, one hundred seventeen".