13815121282 has 12 divisors (see below), whose sum is σ = 21079877526. Its totient is φ = 6790479920.

The previous prime is 13815121267. The next prime is 13815121319. The reversal of 13815121282 is 28212151831.

It can be written as a sum of positive squares in only one way, i.e., 13386258601 + 428862681 = 115699^2 + 20709^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 985219 + ... + 999142.

Almost surely, 2^13815121282 is an apocalyptic number.

13815121282 is a deficient number, since it is larger than the sum of its proper divisors (7264756244).

13815121282 is an equidigital number, since it uses as much as digits as its factorization.

13815121282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984481 (or 1984422 counting only the distinct ones).

The product of its digits is 7680, while the sum is 34.

The spelling of 13815121282 in words is "thirteen billion, eight hundred fifteen million, one hundred twenty-one thousand, two hundred eighty-two".