31103101013 has 2 divisors, whose sum is σ = 31103101014. Its totient is φ = 31103101012.

The previous prime is 31103100991. The next prime is 31103101037. The reversal of 31103101013 is 31010130113.

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., 29153172049 + 1949928964 = 170743^2 + 44158^2 .

It is an emirp because it is prime and its reverse (31010130113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31103101013 - 2⁶ = 31103100949 is a prime.

It is a super-3 number, since 3×31103101013³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31103101093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551550506 + 15551550507.

It is an arithmetic number, because the mean of its divisors is an integer number (15551550507).

Almost surely, 2^31103101013 is an apocalyptic number.

It is an amenable number.

31103101013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103101013 is an equidigital number, since it uses as much as digits as its factorization.

31103101013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 14.

Adding to 31103101013 its reverse (31010130113), we get a palindrome (62113231126).

The spelling of 31103101013 in words is "thirty-one billion, one hundred three million, one hundred one thousand, thirteen".