12405121282 has 4 divisors (see below), whose sum is σ = 18607681926. Its totient is φ = 6202560640.

The previous prime is 12405121279. The next prime is 12405121301. The reversal of 12405121282 is 28212150421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10578328201 + 1826793081 = 102851^2 + 42741^2 .

It is a super-2 number, since 2×12405121282² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12405121282.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3101280319 + ... + 3101280322.

Almost surely, 2^12405121282 is an apocalyptic number.

12405121282 is a deficient number, since it is larger than the sum of its proper divisors (6202560644).

12405121282 is an equidigital number, since it uses as much as digits as its factorization.

12405121282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6202560643.

The product of its (nonzero) digits is 2560, while the sum is 28.

The spelling of 12405121282 in words is "twelve billion, four hundred five million, one hundred twenty-one thousand, two hundred eighty-two".