31211300013 has 32 divisors (see below), whose sum is σ = 43339407360. Its totient is φ = 19961847360.

The previous prime is 31211299993. The next prime is 31211300017. The reversal of 31211300013 is 31000311213.

It is not a de Polignac number, because 31211300013 - 2⁶ = 31211299949 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31211299965 and 31211300001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211300017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7986606 + ... + 7990512.

It is an arithmetic number, because the mean of its divisors is an integer number (1354356480).

Almost surely, 2^31211300013 is an apocalyptic number.

It is an amenable number.

31211300013 is a deficient number, since it is larger than the sum of its proper divisors (12128107347).

31211300013 is a wasteful number, since it uses less digits than its factorization.

31211300013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4937.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31211300013 its reverse (31000311213), we get a palindrome (62211611226).

The spelling of 31211300013 in words is "thirty-one billion, two hundred eleven million, three hundred thousand, thirteen".