221121021112 has 8 divisors (see below), whose sum is σ = 414601914600. Its totient is φ = 110560510552.

The previous prime is 221121021083. The next prime is 221121021131. The reversal of 221121021112 is 211120121122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×221121021112² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13820063812 + ... + 13820063827.

It is an arithmetic number, because the mean of its divisors is an integer number (51825239325).

Almost surely, 2^221121021112 is an apocalyptic number.

It is an amenable number.

221121021112 is a deficient number, since it is larger than the sum of its proper divisors (193480893488).

221121021112 is a wasteful number, since it uses less digits than its factorization.

221121021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27640127645 (or 27640127641 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221121021112 its reverse (211120121122), we get a palindrome (432241142234).

It can be divided in two parts, 2211210 and 21112, that added together give a palindrome (2232322).

The spelling of 221121021112 in words is "two hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, one hundred twelve".