12211002125 has 24 divisors (see below), whose sum is σ = 17727393528. Its totient is φ = 8373254400.

The previous prime is 12211002109. The next prime is 12211002149. The reversal of 12211002125 is 52120011221.

It can be written as a sum of positive squares in 4 ways, for example, as 1275489796 + 10935512329 = 35714^2 + 104573^2 .

It is not a de Polignac number, because 12211002125 - 2⁴ = 12211002109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 990692 + ... + 1002941.

It is an arithmetic number, because the mean of its divisors is an integer number (738641397).

Almost surely, 2^12211002125 is an apocalyptic number.

It is an amenable number.

12211002125 is a deficient number, since it is larger than the sum of its proper divisors (5516391403).

12211002125 is an equidigital number, since it uses as much as digits as its factorization.

12211002125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993662 (or 1993645 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 12211002125 its reverse (52120011221), we get a palindrome (64331013346).

The spelling of 12211002125 in words is "twelve billion, two hundred eleven million, two thousand, one hundred twenty-five".