221221201010112 has 42 divisors (see below), whose sum is σ = 634090629980288. Its totient is φ = 73740400336512.

The previous prime is 221221201010071. The next prime is 221221201010113. The reversal of 221221201010112 is 211010102122122.

221221201010112 is a `hidden beast` number, since 221 + 221 + 201 + 0 + 10 + 1 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221201010113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 192032291968 + ... + 192032293119.

Almost surely, 2^{221221201010112} is an apocalyptic number.

It is an amenable number.

221221201010112 is an abundant number, since it is smaller than the sum of its proper divisors (412869428970176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221221201010112 is a wasteful number, since it uses less digits than its factorization.

221221201010112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384064585105 (or 384064585092 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221221201010112 its reverse (211010102122122), we get a palindrome (432231303132234).

It can be divided in two parts, 2212212010 and 10112, that added together give a palindrome (2212222122).

The spelling of 221221201010112 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, ten thousand, one hundred twelve".