229956121 has 2 divisors, whose sum is σ = 229956122. Its totient is φ = 229956120.

The previous prime is 229956119. The next prime is 229956137. The reversal of 229956121 is 121659922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216531225 + 13424896 = 14715^2 + 3664^2 .

It is a cyclic number.

It is not a de Polignac number, because 229956121 - 2¹ = 229956119 is a prime.

Together with 229956119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (229956151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114978060 + 114978061.

It is an arithmetic number, because the mean of its divisors is an integer number (114978061).

Almost surely, 2^229956121 is an apocalyptic number.

It is an amenable number.

229956121 is a deficient number, since it is larger than the sum of its proper divisors (1).

229956121 is an equidigital number, since it uses as much as digits as its factorization.

229956121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 229956121 is about 15164.3041713097. The cubic root of 229956121 is about 612.6536022373.

The spelling of 229956121 in words is "two hundred twenty-nine million, nine hundred fifty-six thousand, one hundred twenty-one".