12121432522 has 8 divisors (see below), whose sum is σ = 18525208356. Its totient is φ = 5946363072.

The previous prime is 12121432513. The next prime is 12121432523. The reversal of 12121432522 is 22523412121.

It can be written as a sum of positive squares in 2 ways, for example, as 11404317681 + 717114841 = 106791^2 + 26779^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12121432523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57176463 + ... + 57176674.

Almost surely, 2^12121432522 is an apocalyptic number.

12121432522 is a deficient number, since it is larger than the sum of its proper divisors (6403775834).

12121432522 is a wasteful number, since it uses less digits than its factorization.

12121432522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114353192.

The product of its digits is 1920, while the sum is 25.

Adding to 12121432522 its reverse (22523412121), we get a palindrome (34644844643).

The spelling of 12121432522 in words is "twelve billion, one hundred twenty-one million, four hundred thirty-two thousand, five hundred twenty-two".