111122222200221 has 64 divisors (see below), whose sum is σ = 157489640663040. Its totient is φ = 69542458951680.

The previous prime is 111122222200217. The next prime is 111122222200229. The reversal of 111122222200221 is 122002222221111.

It is not a de Polignac number, because 111122222200221 - 2² = 111122222200217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122222200229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9999294561 + ... + 9999305673.

It is an arithmetic number, because the mean of its divisors is an integer number (2460775635360).

Almost surely, 2^{111122222200221} is an apocalyptic number.

It is an amenable number.

111122222200221 is a deficient number, since it is larger than the sum of its proper divisors (46367418462819).

111122222200221 is a wasteful number, since it uses less digits than its factorization.

111122222200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15106.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 111122222200221 its reverse (122002222221111), we get a palindrome (233124444421332).

The spelling of 111122222200221 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred twenty-two million, two hundred thousand, two hundred twenty-one".