31103310312101 has 2 divisors, whose sum is σ = 31103310312102. Its totient is φ = 31103310312100.

The previous prime is 31103310312091. The next prime is 31103310312121. The reversal of 31103310312101 is 10121301330113.

It is an a-pointer prime, because the next prime (31103310312121) can be obtained adding 31103310312101 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26371819622500 + 4731490689601 = 5135350^2 + 2175199^2 .

It is an emirp because it is prime and its reverse (10121301330113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31103310312101 - 2³⁰ = 31102236570277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31103310312121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551655156050 + 15551655156051.

It is an arithmetic number, because the mean of its divisors is an integer number (15551655156051).

Almost surely, 2^{31103310312101} is an apocalyptic number.

It is an amenable number.

31103310312101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103310312101 is an equidigital number, since it uses as much as digits as its factorization.

31103310312101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 31103310312101 its reverse (10121301330113), we get a palindrome (41224611642214).

The spelling of 31103310312101 in words is "thirty-one trillion, one hundred three billion, three hundred ten million, three hundred twelve thousand, one hundred one".