221311203112 has 16 divisors (see below), whose sum is σ = 417743464500. Its totient is φ = 109912945920.

The previous prime is 221311203101. The next prime is 221311203133. The reversal of 221311203112 is 211302113122.

It can be written as a sum of positive squares in 2 ways, for example, as 168876614916 + 52434588196 = 410946^2 + 228986^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221311203112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92830689 + ... + 92833072.

Almost surely, 2^221311203112 is an apocalyptic number.

It is an amenable number.

221311203112 is a deficient number, since it is larger than the sum of its proper divisors (196432261388).

221311203112 is a wasteful number, since it uses less digits than its factorization.

221311203112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185663916 (or 185663912 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221311203112 its reverse (211302113122), we get a palindrome (432613316234).

The spelling of 221311203112 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred three thousand, one hundred twelve".