111122222101221 has 8 divisors (see below), whose sum is σ = 152167367201824. Its totient is φ = 72079279200720.

The previous prime is 111122222101181. The next prime is 111122222101279. The reversal of 111122222101221 is 122101222221111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111122222101221 - 2⁹ = 111122222100709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122222109221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500550549895 + ... + 500550550116.

It is an arithmetic number, because the mean of its divisors is an integer number (19020920900228).

Almost surely, 2^{111122222101221} is an apocalyptic number.

It is an amenable number.

111122222101221 is a deficient number, since it is larger than the sum of its proper divisors (41045145100603).

111122222101221 is a wasteful number, since it uses less digits than its factorization.

111122222101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001101100051.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 111122222101221 its reverse (122101222221111), we get a palindrome (233223444322332).

The spelling of 111122222101221 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred one thousand, two hundred twenty-one".