1111020112221 has 16 divisors (see below), whose sum is σ = 1485705001536. Its totient is φ = 738508069376.

The previous prime is 1111020112219. The next prime is 1111020112259. The reversal of 1111020112221 is 1222110201111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1111020112221 - 2¹ = 1111020112219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111020112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111020112201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11827786 + ... + 11921348.

It is an arithmetic number, because the mean of its divisors is an integer number (92856562596).

Almost surely, 2^{1111020112221} is an apocalyptic number.

It is an amenable number.

1111020112221 is a deficient number, since it is larger than the sum of its proper divisors (374684889315).

1111020112221 is a wasteful number, since it uses less digits than its factorization.

1111020112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105132.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111020112221 its reverse (1222110201111), we get a palindrome (2333130313332).

The spelling of 1111020112221 in words is "one trillion, one hundred eleven billion, twenty million, one hundred twelve thousand, two hundred twenty-one".