121369617836944 has 15 divisors (see below), whose sum is σ = 235153719939217. Its totient is φ = 60684786884896.

The previous prime is 121369617836923. The next prime is 121369617836947. The reversal of 121369617836944 is 449638716963121.

It is a happy number.

The square root of 121369617836944 is 11016788.

It is a perfect power (a square), and thus also a powerful number.

121369617836944 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4899936416400 + 116469681420544 = 2213580^2 + 10792112^2 .

It is a super-2 number, since 2×121369617836944² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121369617836947) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 42690054 + ... + 45444250.

Almost surely, 2^{121369617836944} is an apocalyptic number.

121369617836944 is the 11016788-th square number.

It is an amenable number.

121369617836944 is a deficient number, since it is larger than the sum of its proper divisors (113784102102273).

121369617836944 is an frugal number, since it uses more digits than its factorization.

121369617836944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5508402 (or 2754199 counting only the distinct ones).

The product of its digits is 282175488, while the sum is 70.

The spelling of 121369617836944 in words is "one hundred twenty-one trillion, three hundred sixty-nine billion, six hundred seventeen million, eight hundred thirty-six thousand, nine hundred forty-four".