115021021 has 2 divisors, whose sum is σ = 115021022. Its totient is φ = 115021020.

The previous prime is 115021009. The next prime is 115021033. The reversal of 115021021 is 120120511.

It is a balanced prime because it is at equal distance from previous prime (115021009) and next prime (115021033).

It can be written as a sum of positive squares in only one way, i.e., 78960996 + 36060025 = 8886^2 + 6005^2 .

It is a cyclic number.

It is not a de Polignac number, because 115021021 - 2¹⁵ = 114988253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 115020992 and 115021010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115021061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57510510 + 57510511.

It is an arithmetic number, because the mean of its divisors is an integer number (57510511).

Almost surely, 2^115021021 is an apocalyptic number.

It is an amenable number.

115021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

115021021 is an equidigital number, since it uses as much as digits as its factorization.

115021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 115021021 is about 10724.7853591575. The cubic root of 115021021 is about 486.3240414343.

Adding to 115021021 its reverse (120120511), we get a palindrome (235141532).

The spelling of 115021021 in words is "one hundred fifteen million, twenty-one thousand, twenty-one".