11666535231222 has 48 divisors (see below), whose sum is σ = 26855863997040. Its totient is φ = 3653267317056.

The previous prime is 11666535230983. The next prime is 11666535231223. The reversal of 11666535231222 is 22213253566611.

It is a super-2 number, since 2×11666535231222² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666535231223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 302003448 + ... + 302042075.

It is an arithmetic number, because the mean of its divisors is an integer number (559497166605).

Almost surely, 2^{11666535231222} is an apocalyptic number.

11666535231222 is an abundant number, since it is smaller than the sum of its proper divisors (15189328765818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11666535231222 is a wasteful number, since it uses less digits than its factorization.

11666535231222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604045597 (or 604045594 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

Adding to 11666535231222 its reverse (22213253566611), we get a palindrome (33879788797833).

The spelling of 11666535231222 in words is "eleven trillion, six hundred sixty-six billion, five hundred thirty-five million, two hundred thirty-one thousand, two hundred twenty-two".