201101430721 has 2 divisors, whose sum is σ = 201101430722. Its totient is φ = 201101430720.

The previous prime is 201101430709. The next prime is 201101430743. The reversal of 201101430721 is 127034101102.

It is a happy number.

201101430721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (201101430743) can be obtained adding 201101430721 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139547820721 + 61553610000 = 373561^2 + 248100^2 .

It is a cyclic number.

It is not a de Polignac number, because 201101430721 - 2⁹ = 201101430209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201101430692 and 201101430701.

It is not a weakly prime, because it can be changed into another prime (201101470721) 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, 100550715360 + 100550715361.

It is an arithmetic number, because the mean of its divisors is an integer number (100550715361).

Almost surely, 2^201101430721 is an apocalyptic number.

It is an amenable number.

201101430721 is a deficient number, since it is larger than the sum of its proper divisors (1).

201101430721 is an equidigital number, since it uses as much as digits as its factorization.

201101430721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 201101430721 its reverse (127034101102), we get a palindrome (328135531823).

The spelling of 201101430721 in words is "two hundred one billion, one hundred one million, four hundred thirty thousand, seven hundred twenty-one".