39118791221 has 8 divisors (see below), whose sum is σ = 40526475264. Its totient is φ = 37720218960.

The previous prime is 39118791203. The next prime is 39118791241. The reversal of 39118791221 is 12219781193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39118791221 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 (39118791241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2269205 + ... + 2286378.

It is an arithmetic number, because the mean of its divisors is an integer number (5065809408).

Almost surely, 2^39118791221 is an apocalyptic number.

39118791221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

39118791221 is a deficient number, since it is larger than the sum of its proper divisors (1407684043).

39118791221 is a wasteful number, since it uses less digits than its factorization.

39118791221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555891.

The product of its digits is 54432, while the sum is 44.

The spelling of 39118791221 in words is "thirty-nine billion, one hundred eighteen million, seven hundred ninety-one thousand, two hundred twenty-one".