111010552021 has 2 divisors, whose sum is σ = 111010552022. Its totient is φ = 111010552020.

The previous prime is 111010551991. The next prime is 111010552049. The reversal of 111010552021 is 120255010111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87175515025 + 23835036996 = 295255^2 + 154386^2 .

It is an emirp because it is prime and its reverse (120255010111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111010552021 - 2³⁵ = 76650813653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111010552021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111010552421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505276010 + 55505276011.

It is an arithmetic number, because the mean of its divisors is an integer number (55505276011).

Almost surely, 2^111010552021 is an apocalyptic number.

It is an amenable number.

111010552021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111010552021 is an equidigital number, since it uses as much as digits as its factorization.

111010552021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 19.

Adding to 111010552021 its reverse (120255010111), we get a palindrome (231265562132).

The spelling of 111010552021 in words is "one hundred eleven billion, ten million, five hundred fifty-two thousand, twenty-one".