221211011112 has 128 divisors (see below), whose sum is σ = 699045446400. Its totient is φ = 56764551168.

The previous prime is 221211011107. The next prime is 221211011141. The reversal of 221211011112 is 211110112122.

It is a happy number.

It is a super-2 number, since 2×221211011112² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221211011091 and 221211011100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1287937 + ... + 1449552.

It is an arithmetic number, because the mean of its divisors is an integer number (5461292550).

Almost surely, 2^221211011112 is an apocalyptic number.

It is an amenable number.

221211011112 is an abundant number, since it is smaller than the sum of its proper divisors (477834435288).

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

221211011112 is a wasteful number, since it uses less digits than its factorization.

221211011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737555 (or 2737551 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221211011112 its reverse (211110112122), we get a palindrome (432321123234).

It can be divided in two parts, 2212110 and 11112, that added together give a palindrome (2223222).

The spelling of 221211011112 in words is "two hundred twenty-one billion, two hundred eleven million, eleven thousand, one hundred twelve".