111011200102021 has 2 divisors, whose sum is σ = 111011200102022. Its totient is φ = 111011200102020.

The previous prime is 111011200102007. The next prime is 111011200102043. The reversal of 111011200102021 is 120201002110111.

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., 105336866390625 + 5674333711396 = 10263375^2 + 2382086^2 .

It is a cyclic number.

It is not a de Polignac number, because 111011200102021 - 2²⁷ = 111011065884293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111011200101992 and 111011200102010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111011200102051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505600051010 + 55505600051011.

It is an arithmetic number, because the mean of its divisors is an integer number (55505600051011).

Almost surely, 2^{111011200102021} is an apocalyptic number.

It is an amenable number.

111011200102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111011200102021 is an equidigital number, since it uses as much as digits as its factorization.

111011200102021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 111011200102021 its reverse (120201002110111), we get a palindrome (231212202212132).

The spelling of 111011200102021 in words is "one hundred eleven trillion, eleven billion, two hundred million, one hundred two thousand, twenty-one".