221242201123312 has 40 divisors (see below), whose sum is σ = 441419320024496. Its totient is φ = 107360309661696.

The previous prime is 221242201123289. The next prime is 221242201123319. The reversal of 221242201123312 is 213321102242122.

It is a super-2 number, since 2×221242201123312² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221242201123319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1024009713 + ... + 1024225744.

Almost surely, 2^{221242201123312} is an apocalyptic number.

It is an amenable number.

221242201123312 is a deficient number, since it is larger than the sum of its proper divisors (220177118901184).

221242201123312 is a wasteful number, since it uses less digits than its factorization.

221242201123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048235665 (or 2048235659 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 221242201123312 its reverse (213321102242122), we get a palindrome (434563303365434).

The spelling of 221242201123312 in words is "two hundred twenty-one trillion, two hundred forty-two billion, two hundred one million, one hundred twenty-three thousand, three hundred twelve".