31301222201 has 2 divisors, whose sum is σ = 31301222202. Its totient is φ = 31301222200.

The previous prime is 31301222189. The next prime is 31301222219. The reversal of 31301222201 is 10222210313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25368525625 + 5932696576 = 159275^2 + 77024^2 .

It is a cyclic number.

It is not a de Polignac number, because 31301222201 - 2³⁴ = 14121353017 is a prime.

It is a super-2 number, since 2×31301222201² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31301222201.

It is not a weakly prime, because it can be changed into another prime (31301222221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15650611100 + 15650611101.

It is an arithmetic number, because the mean of its divisors is an integer number (15650611101).

Almost surely, 2^31301222201 is an apocalyptic number.

It is an amenable number.

31301222201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31301222201 is an equidigital number, since it uses as much as digits as its factorization.

31301222201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31301222201 its reverse (10222210313), we get a palindrome (41523432514).

The spelling of 31301222201 in words is "thirty-one billion, three hundred one million, two hundred twenty-two thousand, two hundred one".