31201330217201 has 2 divisors, whose sum is σ = 31201330217202. Its totient is φ = 31201330217200.

The previous prime is 31201330217143. The next prime is 31201330217221. The reversal of 31201330217201 is 10271203310213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18772497260176 + 12428832957025 = 4332724^2 + 3525455^2 .

It is an emirp because it is prime and its reverse (10271203310213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31201330217201 is a prime.

It is not a weakly prime, because it can be changed into another prime (31201330217221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600665108600 + 15600665108601.

It is an arithmetic number, because the mean of its divisors is an integer number (15600665108601).

Almost surely, 2^{31201330217201} is an apocalyptic number.

It is an amenable number.

31201330217201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201330217201 is an equidigital number, since it uses as much as digits as its factorization.

31201330217201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 31201330217201 its reverse (10271203310213), we get a palindrome (41472533527414).

The spelling of 31201330217201 in words is "thirty-one trillion, two hundred one billion, three hundred thirty million, two hundred seventeen thousand, two hundred one".