115221013 has 4 divisors (see below), whose sum is σ = 115296480. Its totient is φ = 115145548.

The previous prime is 115221011. The next prime is 115221023. The reversal of 115221013 is 310122511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310122511 = 113 ⋅2744447.

It is a cyclic number.

It is not a de Polignac number, because 115221013 - 2¹ = 115221011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115221011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35395 + ... + 38512.

It is an arithmetic number, because the mean of its divisors is an integer number (28824120).

Almost surely, 2^115221013 is an apocalyptic number.

It is an amenable number.

115221013 is a deficient number, since it is larger than the sum of its proper divisors (75467).

115221013 is an equidigital number, since it uses as much as digits as its factorization.

115221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75466.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 115221013 is about 10734.1051327067. The cubic root of 115221013 is about 486.6057424099.

Adding to 115221013 its reverse (310122511), we get a palindrome (425343524).

The spelling of 115221013 in words is "one hundred fifteen million, two hundred twenty-one thousand, thirteen".