21020150201 has 2 divisors, whose sum is σ = 21020150202. Its totient is φ = 21020150200.

The previous prime is 21020150197. The next prime is 21020150227. The reversal of 21020150201 is 10205102012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12916549801 + 8103600400 = 113651^2 + 90020^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020150201 - 2² = 21020150197 is a prime.

It is a super-4 number, since 4×21020150201⁴ (a number of 42 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21020150101) 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, 10510075100 + 10510075101.

It is an arithmetic number, because the mean of its divisors is an integer number (10510075101).

Almost surely, 2^21020150201 is an apocalyptic number.

It is an amenable number.

21020150201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020150201 is an equidigital number, since it uses as much as digits as its factorization.

21020150201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 21020150201 its reverse (10205102012), we get a palindrome (31225252213).

The spelling of 21020150201 in words is "twenty-one billion, twenty million, one hundred fifty thousand, two hundred one".