12211634203138 has 32 divisors (see below), whose sum is σ = 19633726909440. Its totient is φ = 5676173817600.

The previous prime is 12211634203133. The next prime is 12211634203147. The reversal of 12211634203138 is 83130243611221.

It is a super-2 number, since 2×12211634203138² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211634203097 and 12211634203106.

It is not an unprimeable number, because it can be changed into a prime (12211634203133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2804706 + ... + 5682397.

It is an arithmetic number, because the mean of its divisors is an integer number (613553965920).

Almost surely, 2^{12211634203138} is an apocalyptic number.

12211634203138 is a deficient number, since it is larger than the sum of its proper divisors (7422092706302).

12211634203138 is a wasteful number, since it uses less digits than its factorization.

12211634203138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8487642.

The product of its (nonzero) digits is 41472, while the sum is 37.

Adding to 12211634203138 its reverse (83130243611221), we get a palindrome (95341877814359).

The spelling of 12211634203138 in words is "twelve trillion, two hundred eleven billion, six hundred thirty-four million, two hundred three thousand, one hundred thirty-eight".