31210440101 has 2 divisors, whose sum is σ = 31210440102. Its totient is φ = 31210440100.

The previous prime is 31210440049. The next prime is 31210440161. The reversal of 31210440101 is 10104401213.

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., 28469812900 + 2740627201 = 168730^2 + 52351^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31210440101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31210440101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31210440161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605220050 + 15605220051.

It is an arithmetic number, because the mean of its divisors is an integer number (15605220051).

Almost surely, 2^31210440101 is an apocalyptic number.

It is an amenable number.

31210440101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31210440101 is an equidigital number, since it uses as much as digits as its factorization.

31210440101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 31210440101 its reverse (10104401213), we get a palindrome (41314841314).

The spelling of 31210440101 in words is "thirty-one billion, two hundred ten million, four hundred forty thousand, one hundred one".