1111102022221 has 4 divisors (see below), whose sum is σ = 1122103032444. Its totient is φ = 1100101012000.

The previous prime is 1111102022203. The next prime is 1111102022287. The reversal of 1111102022221 is 1222202011111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 755004588100 + 356097434121 = 868910^2 + 596739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111102022221 - 2¹⁵ = 1111101989453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111102022195 and 1111102022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111102020221) 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 3 ways as a sum of consecutive naturals, for example, 5500504960 + ... + 5500505161.

It is an arithmetic number, because the mean of its divisors is an integer number (280525758111).

Almost surely, 2^{1111102022221} is an apocalyptic number.

It is an amenable number.

1111102022221 is a deficient number, since it is larger than the sum of its proper divisors (11001010223).

1111102022221 is a wasteful number, since it uses less digits than its factorization.

1111102022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11001010222.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1111102022221 its reverse (1222202011111), we get a palindrome (2333304033332).

The spelling of 1111102022221 in words is "one trillion, one hundred eleven billion, one hundred two million, twenty-two thousand, two hundred twenty-one".