201021229 has 2 divisors, whose sum is σ = 201021230. Its totient is φ = 201021228.

The previous prime is 201021211. The next prime is 201021241. The reversal of 201021229 is 922120102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178837129 + 22184100 = 13373^2 + 4710^2 .

It is a cyclic number.

It is not a de Polignac number, because 201021229 - 2⁷ = 201021101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201025229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510614 + 100510615.

It is an arithmetic number, because the mean of its divisors is an integer number (100510615).

Almost surely, 2^201021229 is an apocalyptic number.

It is an amenable number.

201021229 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021229 is an equidigital number, since it uses as much as digits as its factorization.

201021229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 201021229 is about 14178.1955480943. The cubic root of 201021229 is about 585.7972221783.

The spelling of 201021229 in words is "two hundred one million, twenty-one thousand, two hundred twenty-nine".