121118364821 has 8 divisors (see below), whose sum is σ = 121914466584. Its totient is φ = 120322575360.

The previous prime is 121118364811. The next prime is 121118364869. The reversal of 121118364821 is 128463811121.

It can be written as a sum of positive squares in 4 ways, for example, as 19714968100 + 101403396721 = 140410^2 + 318439^2 .

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-121118364821 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 (121118364811) 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 7 ways as a sum of consecutive naturals, for example, 727301 + ... + 878181.

It is an arithmetic number, because the mean of its divisors is an integer number (15239308323).

Almost surely, 2^121118364821 is an apocalyptic number.

It is an amenable number.

121118364821 is a deficient number, since it is larger than the sum of its proper divisors (796101763).

121118364821 is a wasteful number, since it uses less digits than its factorization.

121118364821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156151.

The product of its digits is 18432, while the sum is 38.

The spelling of 121118364821 in words is "one hundred twenty-one billion, one hundred eighteen million, three hundred sixty-four thousand, eight hundred twenty-one".