221112011220201 has 12 divisors (see below), whose sum is σ = 319384165767940. Its totient is φ = 147407938452000.

The previous prime is 221112011220197. The next prime is 221112011220203. The reversal of 221112011220201 is 102022110211122.

221112011220201 is a `hidden beast` number, since 2 + 211 + 1 + 20 + 11 + 220 + 201 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 142761896786601 + 78350114433600 = 11948301^2 + 8851560^2 .

It is not a de Polignac number, because 221112011220201 - 2² = 221112011220197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221112011220203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21162951 + ... + 29834451.

Almost surely, 2^{221112011220201} is an apocalyptic number.

It is an amenable number.

221112011220201 is a deficient number, since it is larger than the sum of its proper divisors (98272154547739).

221112011220201 is a wasteful number, since it uses less digits than its factorization.

221112011220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11504696 (or 11504693 counting only the distinct ones).

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

Adding to 221112011220201 its reverse (102022110211122), we get a palindrome (323134121431323).

The spelling of 221112011220201 in words is "two hundred twenty-one trillion, one hundred twelve billion, eleven million, two hundred twenty thousand, two hundred one".