221122211121220 has 24 divisors (see below), whose sum is σ = 464946677241984. Its totient is φ = 88336497041376.

The previous prime is 221122211121193. The next prime is 221122211121223. The reversal of 221122211121220 is 22121112221122.

It is a super-2 number, since 2×221122211121220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221122211121191 and 221122211121200.

It is not an unprimeable number, because it can be changed into a prime (221122211121223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7024196812 + ... + 7024228291.

It is an arithmetic number, because the mean of its divisors is an integer number (19372778218416).

Almost surely, 2^{221122211121220} is an apocalyptic number.

221122211121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122211121220 is an abundant number, since it is smaller than the sum of its proper divisors (243824466120764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221122211121220 is a wasteful number, since it uses less digits than its factorization.

221122211121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14048425899 (or 14048425897 counting only the distinct ones).

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

Adding to 221122211121220 its reverse (22121112221122), we get a palindrome (243243323342342).

The spelling of 221122211121220 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty".