31112101205 has 16 divisors (see below), whose sum is σ = 37767010944. Its totient is φ = 24602253120.

The previous prime is 31112101201. The next prime is 31112101249. The reversal of 31112101205 is 50210121113.

It is not a de Polignac number, because 31112101205 - 2² = 31112101201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112101201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222782 + ... + 334448.

It is an arithmetic number, because the mean of its divisors is an integer number (2360438184).

Almost surely, 2^31112101205 is an apocalyptic number.

It is an amenable number.

31112101205 is a deficient number, since it is larger than the sum of its proper divisors (6654909739).

31112101205 is a wasteful number, since it uses less digits than its factorization.

31112101205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112316.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 31112101205 its reverse (50210121113), we get a palindrome (81322222318).

The spelling of 31112101205 in words is "thirty-one billion, one hundred twelve million, one hundred one thousand, two hundred five".