12405213122 has 8 divisors (see below), whose sum is σ = 18630486972. Its totient is φ = 6195050800.

The previous prime is 12405213103. The next prime is 12405213131. The reversal of 12405213122 is 22131250421.

It can be written as a sum of positive squares in 2 ways, for example, as 12403499641 + 1713481 = 111371^2 + 1309^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3775829 + ... + 3779112.

Almost surely, 2^12405213122 is an apocalyptic number.

12405213122 is a deficient number, since it is larger than the sum of its proper divisors (6225273850).

12405213122 is an equidigital number, since it uses as much as digits as its factorization.

12405213122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7555764.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12405213122 its reverse (22131250421), we get a palindrome (34536463543).

The spelling of 12405213122 in words is "twelve billion, four hundred five million, two hundred thirteen thousand, one hundred twenty-two".