122230921 has 2 divisors, whose sum is σ = 122230922. Its totient is φ = 122230920.

The previous prime is 122230919. The next prime is 122230951. The reversal of 122230921 is 129032221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78074896 + 44156025 = 8836^2 + 6645^2 .

It is an emirp because it is prime and its reverse (129032221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122230921 - 2¹ = 122230919 is a prime.

Together with 122230919, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 122230892 and 122230901.

It is not a weakly prime, because it can be changed into another prime (122230951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61115460 + 61115461.

It is an arithmetic number, because the mean of its divisors is an integer number (61115461).

Almost surely, 2^122230921 is an apocalyptic number.

It is an amenable number.

122230921 is a deficient number, since it is larger than the sum of its proper divisors (1).

122230921 is an equidigital number, since it uses as much as digits as its factorization.

122230921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 122230921 is about 11055.8093778791. The cubic root of 122230921 is about 496.2802908162.

The spelling of 122230921 in words is "one hundred twenty-two million, two hundred thirty thousand, nine hundred twenty-one".