201254021 has 2 divisors, whose sum is σ = 201254022. Its totient is φ = 201254020.

The previous prime is 201253999. The next prime is 201254029. The reversal of 201254021 is 120452102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116337796 + 84916225 = 10786^2 + 9215^2 .

It is a cyclic number.

It is not a de Polignac number, because 201254021 - 2¹⁴ = 201237637 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 (201254029) 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, 100627010 + 100627011.

It is an arithmetic number, because the mean of its divisors is an integer number (100627011).

Almost surely, 2^201254021 is an apocalyptic number.

It is an amenable number.

201254021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201254021 is an equidigital number, since it uses as much as digits as its factorization.

201254021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 201254021 is about 14186.4026800313. The cubic root of 201254021 is about 586.0232618209.

The spelling of 201254021 in words is "two hundred one million, two hundred fifty-four thousand, twenty-one".