1168217113221 has 6 divisors (see below), whose sum is σ = 1687424719110. Its totient is φ = 778811408808.

The previous prime is 1168217113207. The next prime is 1168217113277. The reversal of 1168217113221 is 1223117128611.

It is a happy number.

1168217113221 is a `hidden beast` number, since 1 + 168 + 2 + 171 + 1 + 322 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 635296673025 + 532920440196 = 797055^2 + 730014^2 .

It is not a de Polignac number, because 1168217113221 - 2⁹ = 1168217112709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1168217113621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64900950726 + ... + 64900950743.

It is an arithmetic number, because the mean of its divisors is an integer number (281237453185).

Almost surely, 2^{1168217113221} is an apocalyptic number.

It is an amenable number.

1168217113221 is a deficient number, since it is larger than the sum of its proper divisors (519207605889).

1168217113221 is a wasteful number, since it uses less digits than its factorization.

1168217113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129801901475 (or 129801901472 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The spelling of 1168217113221 in words is "one trillion, one hundred sixty-eight billion, two hundred seventeen million, one hundred thirteen thousand, two hundred twenty-one".