221022112222220 has 48 divisors (see below), whose sum is σ = 484956529928640. Its totient is φ = 84455014465536.

The previous prime is 221022112222211. The next prime is 221022112222229. The reversal of 221022112222220 is 22222211220122.

It is an interprime number because it is at equal distance from previous prime (221022112222211) and next prime (221022112222229).

It is a super-2 number, since 2×221022112222220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (221022112222229) 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, 312053837 + ... + 312761316.

It is an arithmetic number, because the mean of its divisors is an integer number (10103261040180).

Almost surely, 2^{221022112222220} is an apocalyptic number.

221022112222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022112222220 is an abundant number, since it is smaller than the sum of its proper divisors (263934417706420).

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

221022112222220 is a wasteful number, since it uses less digits than its factorization.

221022112222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624815954 (or 624815952 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221022112222220 its reverse (22222211220122), we get a palindrome (243244323442342).

The spelling of 221022112222220 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twenty".