111122222201221 has 16 divisors (see below), whose sum is σ = 138560843836800. Its totient is φ = 86576961746880.

The previous prime is 111122222201219. The next prime is 111122222201239. The reversal of 111122222201221 is 122102222221111.

It is not a de Polignac number, because 111122222201221 - 2¹ = 111122222201219 is a prime.

It is a super-2 number, since 2×111122222201221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111122222201192 and 111122222201201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122222201021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97620666 + ... + 98752411.

It is an arithmetic number, because the mean of its divisors is an integer number (8660052739800).

Almost surely, 2^{111122222201221} is an apocalyptic number.

111122222201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111122222201221 is a deficient number, since it is larger than the sum of its proper divisors (27438621635579).

111122222201221 is a wasteful number, since it uses less digits than its factorization.

111122222201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196380444.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 111122222201221 its reverse (122102222221111), we get a palindrome (233224444422332).

The spelling of 111122222201221 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty-one".