12132211138 has 4 divisors (see below), whose sum is σ = 18198316710. Its totient is φ = 6066105568.

The previous prime is 12132211111. The next prime is 12132211139. The reversal of 12132211138 is 83111223121.

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., 9342575649 + 2789635489 = 96657^2 + 52817^2 .

It is a super-2 number, since 2×12132211138² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12132211139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3033052783 + ... + 3033052786.

Almost surely, 2^12132211138 is an apocalyptic number.

12132211138 is a deficient number, since it is larger than the sum of its proper divisors (6066105572).

12132211138 is an equidigital number, since it uses as much as digits as its factorization.

12132211138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066105571.

The product of its digits is 576, while the sum is 25.

Adding to 12132211138 its reverse (83111223121), we get a palindrome (95243434259).

The spelling of 12132211138 in words is "twelve billion, one hundred thirty-two million, two hundred eleven thousand, one hundred thirty-eight".