111001012102021 has 2 divisors, whose sum is σ = 111001012102022. Its totient is φ = 111001012102020.

The previous prime is 111001012101961. The next prime is 111001012102027. The reversal of 111001012102021 is 120201210100111.

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., 110119544613796 + 881467488225 = 10493786^2 + 938865^2 .

It is a cyclic number.

It is not a de Polignac number, because 111001012102021 - 2¹¹ = 111001012099973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111001012101992 and 111001012102010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111001012102027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500506051010 + 55500506051011.

It is an arithmetic number, because the mean of its divisors is an integer number (55500506051011).

Almost surely, 2^{111001012102021} is an apocalyptic number.

It is an amenable number.

111001012102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001012102021 is an equidigital number, since it uses as much as digits as its factorization.

111001012102021 is an evil number, because the sum of its binary digits is even.

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

Adding to 111001012102021 its reverse (120201210100111), we get a palindrome (231202222202132).

The spelling of 111001012102021 in words is "one hundred eleven trillion, one billion, twelve million, one hundred two thousand, twenty-one".