111020111020213 has 2 divisors, whose sum is σ = 111020111020214. Its totient is φ = 111020111020212.

The previous prime is 111020111020199. The next prime is 111020111020223. The reversal of 111020111020213 is 312020111020111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68177025135844 + 42843085884369 = 8256938^2 + 6545463^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020111020213 - 2¹⁷ = 111020110889141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111020111020223) 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, 55510055510106 + 55510055510107.

It is an arithmetic number, because the mean of its divisors is an integer number (55510055510107).

Almost surely, 2^{111020111020213} is an apocalyptic number.

It is an amenable number.

111020111020213 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020111020213 is an equidigital number, since it uses as much as digits as its factorization.

111020111020213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111020111020213 its reverse (312020111020111), we get a palindrome (423040222040324).

The spelling of 111020111020213 in words is "one hundred eleven trillion, twenty billion, one hundred eleven million, twenty thousand, two hundred thirteen".