221132012312 has 16 divisors (see below), whose sum is σ = 414899145000. Its totient is φ = 110492240320.

The previous prime is 221132012279. The next prime is 221132012317. The reversal of 221132012312 is 213210231122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221132012317) 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 3 ways as a sum of consecutive naturals, for example, 9207989 + ... + 9231972.

Almost surely, 2^221132012312 is an apocalyptic number.

It is an amenable number.

221132012312 is a deficient number, since it is larger than the sum of its proper divisors (193767132688).

221132012312 is a wasteful number, since it uses less digits than its factorization.

221132012312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18441466 (or 18441462 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221132012312 its reverse (213210231122), we get a palindrome (434342243434).

The spelling of 221132012312 in words is "two hundred twenty-one billion, one hundred thirty-two million, twelve thousand, three hundred twelve".