31130111031 has 16 divisors (see below), whose sum is σ = 41821467264. Its totient is φ = 20596660064.

The previous prime is 31130111027. The next prime is 31130111039. The reversal of 31130111031 is 13011103113.

It is a cyclic number.

It is not a de Polignac number, because 31130111031 - 2² = 31130111027 is a prime.

It is a super-2 number, since 2×31130111031² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31130111031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130111039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143776 + ... + 287978.

It is an arithmetic number, because the mean of its divisors is an integer number (2613841704).

Almost surely, 2^31130111031 is an apocalyptic number.

31130111031 is a deficient number, since it is larger than the sum of its proper divisors (10691356233).

31130111031 is a wasteful number, since it uses less digits than its factorization.

31130111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144750.

The product of its (nonzero) digits is 27, while the sum is 15.

Adding to 31130111031 its reverse (13011103113), we get a palindrome (44141214144).

The spelling of 31130111031 in words is "thirty-one billion, one hundred thirty million, one hundred eleven thousand, thirty-one".