102021112021 has 2 divisors, whose sum is σ = 102021112022. Its totient is φ = 102021112020.

The previous prime is 102021112013. The next prime is 102021112027. The reversal of 102021112021 is 120211120201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102006778225 + 14333796 = 319385^2 + 3786^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021112021 - 2³ = 102021112013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102021111992 and 102021112010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021112027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010556010 + 51010556011.

It is an arithmetic number, because the mean of its divisors is an integer number (51010556011).

Almost surely, 2^102021112021 is an apocalyptic number.

It is an amenable number.

102021112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021112021 is an equidigital number, since it uses as much as digits as its factorization.

102021112021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102021112021 its reverse (120211120201), we get a palindrome (222232232222).

The spelling of 102021112021 in words is "one hundred two billion, twenty-one million, one hundred twelve thousand, twenty-one".