1222221102221 has 8 divisors (see below), whose sum is σ = 1444990465920. Its totient is φ = 1011493325808.

The previous prime is 1222221102211. The next prime is 1222221102233. The reversal of 1222221102221 is 1222011222221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1222221102221 - 2¹⁴ = 1222221085837 is a prime.

It is a super-2 number, since 2×1222221102221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222221102193 and 1222221102202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222221102211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3010396601 + ... + 3010397006.

It is an arithmetic number, because the mean of its divisors is an integer number (180623808240).

Almost surely, 2^{1222221102221} is an apocalyptic number.

It is an amenable number.

1222221102221 is a deficient number, since it is larger than the sum of its proper divisors (222769363699).

1222221102221 is an equidigital number, since it uses as much as digits as its factorization.

1222221102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6020793643.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1222221102221 its reverse (1222011222221), we get a palindrome (2444232324442).

The spelling of 1222221102221 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".