12105220532 has 12 divisors (see below), whose sum is σ = 22430261700. Its totient is φ = 5696574336.

The previous prime is 12105220499. The next prime is 12105220607. The reversal of 12105220532 is 23502250121.

It can be written as a sum of positive squares in 2 ways, for example, as 4867294756 + 7237925776 = 69766^2 + 85076^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12105220498 and 12105220507.

It is a congruent number.

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, 89008907 + ... + 89009042.

It is an arithmetic number, because the mean of its divisors is an integer number (1869188475).

Almost surely, 2^12105220532 is an apocalyptic number.

It is an amenable number.

12105220532 is a deficient number, since it is larger than the sum of its proper divisors (10325041168).

12105220532 is a wasteful number, since it uses less digits than its factorization.

12105220532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178017970 (or 178017968 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 12105220532 its reverse (23502250121), we get a palindrome (35607470653).

The spelling of 12105220532 in words is "twelve billion, one hundred five million, two hundred twenty thousand, five hundred thirty-two".