1111213102221 has 8 divisors (see below), whose sum is σ = 1646241632960. Its totient is φ = 740808734796.

The previous prime is 1111213102211. The next prime is 1111213102229. The reversal of 1111213102221 is 1222013121111.

It is a happy number.

1111213102221 is a `hidden beast` number, since 1 + 11 + 121 + 310 + 2 + 221 = 666.

It is not a de Polignac number, because 1111213102221 - 2⁶ = 1111213102157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1111213102194 and 1111213102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111213102229) 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 7 ways as a sum of consecutive naturals, for example, 20578020385 + ... + 20578020438.

It is an arithmetic number, because the mean of its divisors is an integer number (205780204120).

Almost surely, 2^{1111213102221} is an apocalyptic number.

It is an amenable number.

1111213102221 is a deficient number, since it is larger than the sum of its proper divisors (535028530739).

1111213102221 is an equidigital number, since it uses as much as digits as its factorization.

1111213102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41156040832 (or 41156040826 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1111213102221 its reverse (1222013121111), we get a palindrome (2333226223332).

The spelling of 1111213102221 in words is "one trillion, one hundred eleven billion, two hundred thirteen million, one hundred two thousand, two hundred twenty-one".