121162718368 has 48 divisors (see below), whose sum is σ = 245105658504. Its totient is φ = 58915261440.

The previous prime is 121162718351. The next prime is 121162718377. The reversal of 121162718368 is 863817261121.

It can be written as a sum of positive squares in 4 ways, for example, as 119763060624 + 1399657744 = 346068^2 + 37412^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2511046 + ... + 2558842.

Almost surely, 2^121162718368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121162718368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122552829252).

121162718368 is an abundant number, since it is smaller than the sum of its proper divisors (123942940136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121162718368 is a wasteful number, since it uses less digits than its factorization.

121162718368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49985 (or 49977 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

Adding to 121162718368 its reverse (863817261121), we get a palindrome (984979979489).

The spelling of 121162718368 in words is "one hundred twenty-one billion, one hundred sixty-two million, seven hundred eighteen thousand, three hundred sixty-eight".