1111313112221 has 8 divisors (see below), whose sum is σ = 1208648230104. Its totient is φ = 1015670779200.

The previous prime is 1111313112209. The next prime is 1111313112251. The reversal of 1111313112221 is 1222113131111.

It can be written as a sum of positive squares in 4 ways, for example, as 590613768196 + 520699344025 = 768514^2 + 721595^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1111313112221 - 2¹⁰ = 1111313111197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111313112193 and 1111313112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111313112251) 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, 423194846 + ... + 423197471.

It is an arithmetic number, because the mean of its divisors is an integer number (151081028763).

Almost surely, 2^{1111313112221} is an apocalyptic number.

It is an amenable number.

1111313112221 is a deficient number, since it is larger than the sum of its proper divisors (97335117883).

1111313112221 is a wasteful number, since it uses less digits than its factorization.

1111313112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846392431.

The product of its digits is 72, while the sum is 20.

Adding to 1111313112221 its reverse (1222113131111), we get a palindrome (2333426243332).

The spelling of 1111313112221 in words is "one trillion, one hundred eleven billion, three hundred thirteen million, one hundred twelve thousand, two hundred twenty-one".