21662070301 has 2 divisors, whose sum is σ = 21662070302. Its totient is φ = 21662070300.

The previous prime is 21662070253. The next prime is 21662070323. The reversal of 21662070301 is 10307026612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12474656100 + 9187414201 = 111690^2 + 95851^2 .

It is a cyclic number.

It is not a de Polignac number, because 21662070301 - 2⁹ = 21662069789 is a prime.

It is a super-3 number, since 3×21662070301³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21662070301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21662077301) 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, 10831035150 + 10831035151.

It is an arithmetic number, because the mean of its divisors is an integer number (10831035151).

Almost surely, 2^21662070301 is an apocalyptic number.

It is an amenable number.

21662070301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21662070301 is an equidigital number, since it uses as much as digits as its factorization.

21662070301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 21662070301 its reverse (10307026612), we get a palindrome (31969096913).

The spelling of 21662070301 in words is "twenty-one billion, six hundred sixty-two million, seventy thousand, three hundred one".