12221101011222 has 32 divisors (see below), whose sum is σ = 27493286235360. Its totient is φ = 4073700335616.

The previous prime is 12221101011137. The next prime is 12221101011239. The reversal of 12221101011222 is 22211010112221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12221101011195 and 12221101011204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1397012203 + ... + 1397020950.

It is an arithmetic number, because the mean of its divisors is an integer number (859165194855).

Almost surely, 2^{12221101011222} is an apocalyptic number.

12221101011222 is an abundant number, since it is smaller than the sum of its proper divisors (15272185224138).

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

12221101011222 is an frugal number, since it uses more digits than its factorization.

12221101011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794033176 (or 2794033158 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12221101011222 its reverse (22211010112221), we get a palindrome (34432111123443).

The spelling of 12221101011222 in words is "twelve trillion, two hundred twenty-one billion, one hundred one million, eleven thousand, two hundred twenty-two".