31201130101 has 2 divisors, whose sum is σ = 31201130102. Its totient is φ = 31201130100.

The previous prime is 31201130089. The next prime is 31201130137. The reversal of 31201130101 is 10103110213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30624650001 + 576480100 = 174999^2 + 24010^2 .

It is a cyclic number.

It is not a de Polignac number, because 31201130101 - 2¹¹ = 31201128053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31201130161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600565050 + 15600565051.

It is an arithmetic number, because the mean of its divisors is an integer number (15600565051).

Almost surely, 2^31201130101 is an apocalyptic number.

It is an amenable number.

31201130101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201130101 is an equidigital number, since it uses as much as digits as its factorization.

31201130101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31201130101 its reverse (10103110213), we get a palindrome (41304240314).

The spelling of 31201130101 in words is "thirty-one billion, two hundred one million, one hundred thirty thousand, one hundred one".