115021 has 2 divisors, whose sum is σ = 115022. Its totient is φ = 115020.

The previous prime is 115019. The next prime is 115057. The reversal of 115021 is 120511.

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., 114921 + 100 = 339^2 + 10^2 .

It is an emirp because it is prime and its reverse (120511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115021 - 2¹ = 115019 is a prime.

Together with 115019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 114989 and 115007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57510 + 57511.

It is an arithmetic number, because the mean of its divisors is an integer number (57511).

2¹¹⁵⁰²¹ is an apocalyptic number.

It is an amenable number.

115021 is a deficient number, since it is larger than the sum of its proper divisors (1).

115021 is an equidigital number, since it uses as much as digits as its factorization.

115021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 115021 is about 339.1474605537. The cubic root of 115021 is about 48.6324011837.

Adding to 115021 its reverse (120511), we get a palindrome (235532).

The spelling of 115021 in words is "one hundred fifteen thousand, twenty-one".