221111112020112 has 30 divisors (see below), whose sum is σ = 618804014890022. Its totient is φ = 73703704006656.

The previous prime is 221111112020107. The next prime is 221111112020119. The reversal of 221111112020112 is 211020211111122.

It is a happy number.

221111112020112 is a `hidden beast` number, since 221 + 1 + 111 + 120 + 201 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 182674038364416 + 38437073655696 = 13515696^2 + 6199764^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221111112020119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 767746916593 + ... + 767746916880.

Almost surely, 2^{221111112020112} is an apocalyptic number.

It is an amenable number.

221111112020112 is an abundant number, since it is smaller than the sum of its proper divisors (397692902869910).

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

221111112020112 is a wasteful number, since it uses less digits than its factorization.

221111112020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535493833487 (or 1535493833478 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221111112020112 its reverse (211020211111122), we get a palindrome (432131323131234).

The spelling of 221111112020112 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred twelve million, twenty thousand, one hundred twelve".