221133101312 has 18 divisors (see below), whose sum is σ = 441402401958. Its totient is φ = 110566550528.

The previous prime is 221133101261. The next prime is 221133101323. The reversal of 221133101312 is 213101331122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 204506546176 + 16626555136 = 452224^2 + 128944^2 .

It is a super-2 number, since 2×221133101312² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431900333 + ... + 431900844.

Almost surely, 2^221133101312 is an apocalyptic number.

It is an amenable number.

221133101312 is a deficient number, since it is larger than the sum of its proper divisors (220269300646).

221133101312 is an frugal number, since it uses more digits than its factorization.

221133101312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863801193 (or 863801179 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 221133101312 its reverse (213101331122), we get a palindrome (434234432434).

The spelling of 221133101312 in words is "two hundred twenty-one billion, one hundred thirty-three million, one hundred one thousand, three hundred twelve".