111210112021 has 8 divisors (see below), whose sum is σ = 115641037080. Its totient is φ = 106818926592.

The previous prime is 111210112019. The next prime is 111210112109. The reversal of 111210112021 is 120211012111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2583180625 + 108626931396 = 50825^2 + 329586^2 .

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 111210112021 - 2¹ = 111210112019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111210111992 and 111210112010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111210112121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9929200 + ... + 9940393.

It is an arithmetic number, because the mean of its divisors is an integer number (14455129635).

Almost surely, 2^111210112021 is an apocalyptic number.

It is an amenable number.

111210112021 is a deficient number, since it is larger than the sum of its proper divisors (4430925059).

111210112021 is a wasteful number, since it uses less digits than its factorization.

111210112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19869815.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111210112021 its reverse (120211012111), we get a palindrome (231421124132).

The spelling of 111210112021 in words is "one hundred eleven billion, two hundred ten million, one hundred twelve thousand, twenty-one".