201121229 has 2 divisors, whose sum is σ = 201121230. Its totient is φ = 201121228.

The previous prime is 201121183. The next prime is 201121253. The reversal of 201121229 is 922121102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144841225 + 56280004 = 12035^2 + 7502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121229 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201121229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201121259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560614 + 100560615.

It is an arithmetic number, because the mean of its divisors is an integer number (100560615).

Almost surely, 2^201121229 is an apocalyptic number.

It is an amenable number.

201121229 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121229 is an equidigital number, since it uses as much as digits as its factorization.

201121229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 201121229 is about 14181.7216514780. The cubic root of 201121229 is about 585.8943429509.

The spelling of 201121229 in words is "two hundred one million, one hundred twenty-one thousand, two hundred twenty-nine".