1123221102221 has 16 divisors (see below), whose sum is σ = 1145935522368. Its totient is φ = 1100692560000.

The previous prime is 1123221102217. The next prime is 1123221102233. The reversal of 1123221102221 is 1222011223211.

It is a cyclic number.

It is not a de Polignac number, because 1123221102221 - 2² = 1123221102217 is a prime.

It is a super-2 number, since 2×1123221102221² (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 = 1123221102193 and 1123221102202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123221102821) 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, 13766081 + ... + 13847433.

It is an arithmetic number, because the mean of its divisors is an integer number (71620970148).

Almost surely, 2^{1123221102221} is an apocalyptic number.

It is an amenable number.

1123221102221 is a deficient number, since it is larger than the sum of its proper divisors (22714420147).

1123221102221 is an equidigital number, since it uses as much as digits as its factorization.

1123221102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82492.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1123221102221 its reverse (1222011223211), we get a palindrome (2345232325432).

The spelling of 1123221102221 in words is "one trillion, one hundred twenty-three billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".