1111313021221 has 8 divisors (see below), whose sum is σ = 1217083361760. Its totient is φ = 1008440498352.

The previous prime is 1111313021219. The next prime is 1111313021233. The reversal of 1111313021221 is 1221203131111.

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 1111313021221 - 2¹ = 1111313021219 is a prime.

It is a super-2 number, since 2×1111313021221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111313021201) 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, 724453615 + ... + 724455148.

It is an arithmetic number, because the mean of its divisors is an integer number (152135420220).

Almost surely, 2^{1111313021221} is an apocalyptic number.

It is an amenable number.

1111313021221 is a deficient number, since it is larger than the sum of its proper divisors (105770340539).

1111313021221 is a wasteful number, since it uses less digits than its factorization.

1111313021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448908835.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1111313021221 its reverse (1221203131111), we get a palindrome (2332516152332).

The spelling of 1111313021221 in words is "one trillion, one hundred eleven billion, three hundred thirteen million, twenty-one thousand, two hundred twenty-one".