115701221 has 4 divisors (see below), whose sum is σ = 118523244. Its totient is φ = 112879200.

The previous prime is 115701197. The next prime is 115701227. The reversal of 115701221 is 122107511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122107511 = 37 ⋅3300203.

It can be written as a sum of positive squares in 2 ways, for example, as 13468900 + 102232321 = 3670^2 + 10111^2 .

It is a cyclic number.

It is not a de Polignac number, because 115701221 - 2²² = 111506917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115701193 and 115701202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115701227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1410950 + ... + 1411031.

It is an arithmetic number, because the mean of its divisors is an integer number (29630811).

Almost surely, 2^115701221 is an apocalyptic number.

It is an amenable number.

115701221 is a deficient number, since it is larger than the sum of its proper divisors (2822023).

115701221 is an equidigital number, since it uses as much as digits as its factorization.

115701221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822022.

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 115701221 is about 10756.4502044122. The cubic root of 115701221 is about 487.2808163048.

Adding to 115701221 its reverse (122107511), we get a palindrome (237808732).

The spelling of 115701221 in words is "one hundred fifteen million, seven hundred one thousand, two hundred twenty-one".