122215231 has 2 divisors, whose sum is σ = 122215232. Its totient is φ = 122215230.

The previous prime is 122215199. The next prime is 122215273. The reversal of 122215231 is 132512221.

It is a weak prime.

It is an emirp because it is prime and its reverse (132512221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122215231 - 2⁵ = 122215199 is a prime.

It is a super-2 number, since 2×122215231² = 29873125376766722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122215199 and 122215208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122215931) 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 as a sum of consecutive naturals, namely, 61107615 + 61107616.

It is an arithmetic number, because the mean of its divisors is an integer number (61107616).

Almost surely, 2^122215231 is an apocalyptic number.

122215231 is a deficient number, since it is larger than the sum of its proper divisors (1).

122215231 is an equidigital number, since it uses as much as digits as its factorization.

122215231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 19.

The square root of 122215231 is about 11055.0997734077. The cubic root of 122215231 is about 496.2590551341.

Adding to 122215231 its reverse (132512221), we get a palindrome (254727452).

The spelling of 122215231 in words is "one hundred twenty-two million, two hundred fifteen thousand, two hundred thirty-one".