12221212103221 has 16 divisors (see below), whose sum is σ = 14097969317376. Its totient is φ = 10489560480000.

The previous prime is 12221212103209. The next prime is 12221212103239. The reversal of 12221212103221 is 12230121212221.

It is a cyclic number.

It is not a de Polignac number, because 12221212103221 - 2⁵ = 12221212103189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221212103192 and 12221212103201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221212103291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437051040 + ... + 437079001.

It is an arithmetic number, because the mean of its divisors is an integer number (881123082336).

Almost surely, 2^{12221212103221} is an apocalyptic number.

12221212103221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12221212103221 is a deficient number, since it is larger than the sum of its proper divisors (1876757214155).

12221212103221 is a wasteful number, since it uses less digits than its factorization.

12221212103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874130124.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 12221212103221 its reverse (12230121212221), we get a palindrome (24451333315442).

The spelling of 12221212103221 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, one hundred three thousand, two hundred twenty-one".