221220211112 has 16 divisors (see below), whose sum is σ = 417185516340. Its totient is φ = 109970740096.

The previous prime is 221220211063. The next prime is 221220211153. The reversal of 221220211112 is 211112022122.

It can be written as a sum of positive squares in 2 ways, for example, as 157995120196 + 63225090916 = 397486^2 + 251446^2 .

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, 79919213 + ... + 79921980.

Almost surely, 2^221220211112 is an apocalyptic number.

It is an amenable number.

221220211112 is a deficient number, since it is larger than the sum of its proper divisors (195965305228).

221220211112 is a wasteful number, since it uses less digits than its factorization.

221220211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159841372 (or 159841368 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221220211112 its reverse (211112022122), we get a palindrome (432332233234).

The spelling of 221220211112 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, one hundred twelve".