111120013021 has 2 divisors, whose sum is σ = 111120013022. Its totient is φ = 111120013020.

The previous prime is 111120012961. The next prime is 111120013087. The reversal of 111120013021 is 120310021111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105345684900 + 5774328121 = 324570^2 + 75989^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120013021 - 2¹³ = 111120004829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111120012992 and 111120013010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111120010021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560006510 + 55560006511.

It is an arithmetic number, because the mean of its divisors is an integer number (55560006511).

Almost surely, 2^111120013021 is an apocalyptic number.

It is an amenable number.

111120013021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120013021 is an equidigital number, since it uses as much as digits as its factorization.

111120013021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 111120013021 its reverse (120310021111), we get a palindrome (231430034132).

The spelling of 111120013021 in words is "one hundred eleven billion, one hundred twenty million, thirteen thousand, twenty-one".