21671050301 has 2 divisors, whose sum is σ = 21671050302. Its totient is φ = 21671050300.

The previous prime is 21671050249. The next prime is 21671050307. The reversal of 21671050301 is 10305017612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12510646201 + 9160404100 = 111851^2 + 95710^2 .

It is a cyclic number.

It is not a de Polignac number, because 21671050301 - 2¹⁸ = 21670788157 is a prime.

It is a super-2 number, since 2×21671050301² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21671050307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10835525150 + 10835525151.

It is an arithmetic number, because the mean of its divisors is an integer number (10835525151).

Almost surely, 2^21671050301 is an apocalyptic number.

It is an amenable number.

21671050301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21671050301 is an equidigital number, since it uses as much as digits as its factorization.

21671050301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

Adding to 21671050301 its reverse (10305017612), we get a palindrome (31976067913).

The spelling of 21671050301 in words is "twenty-one billion, six hundred seventy-one million, fifty thousand, three hundred one".