111220120222221 has 64 divisors (see below), whose sum is σ = 152666797510656. Its totient is φ = 71988211814400.

The previous prime is 111220120222199. The next prime is 111220120222249. The reversal of 111220120222221 is 122222021022111.

It is not a de Polignac number, because 111220120222221 - 2¹⁸ = 111220119960077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220120222621) 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, 14784007966 + ... + 14784015488.

It is an arithmetic number, because the mean of its divisors is an integer number (2385418711104).

Almost surely, 2^{111220120222221} is an apocalyptic number.

It is an amenable number.

111220120222221 is a deficient number, since it is larger than the sum of its proper divisors (41446677288435).

111220120222221 is a wasteful number, since it uses less digits than its factorization.

111220120222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9442.

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

Adding to 111220120222221 its reverse (122222021022111), we get a palindrome (233442141244332).

The spelling of 111220120222221 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty-one".