31243250212201 has 2 divisors, whose sum is σ = 31243250212202. Its totient is φ = 31243250212200.

The previous prime is 31243250212199. The next prime is 31243250212267. The reversal of 31243250212201 is 10221205234213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17582087610000 + 13661162602201 = 4193100^2 + 3696101^2 .

It is a cyclic number.

It is not a de Polignac number, because 31243250212201 - 2¹ = 31243250212199 is a prime.

It is a super-2 number, since 2×31243250212201² (a number of 28 digits) contains 22 as substring.

Together with 31243250212199, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31243250212201.

It is not a weakly prime, because it can be changed into another prime (31243250212501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15621625106100 + 15621625106101.

It is an arithmetic number, because the mean of its divisors is an integer number (15621625106101).

Almost surely, 2^{31243250212201} is an apocalyptic number.

It is an amenable number.

31243250212201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31243250212201 is an equidigital number, since it uses as much as digits as its factorization.

31243250212201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 31243250212201 its reverse (10221205234213), we get a palindrome (41464455446414).

The spelling of 31243250212201 in words is "thirty-one trillion, two hundred forty-three billion, two hundred fifty million, two hundred twelve thousand, two hundred one".