31201201105 has 16 divisors (see below), whose sum is σ = 38598984144. Its totient is φ = 24197022720.

The previous prime is 31201201081. The next prime is 31201201111. The reversal of 31201201105 is 50110210213.

It can be written as a sum of positive squares in 8 ways, for example, as 1581414289 + 29619786816 = 39767^2 + 172104^2 .

It is not a de Polignac number, because 31201201105 - 2⁷ = 31201200977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452532 + ... + 516901.

It is an arithmetic number, because the mean of its divisors is an integer number (2412436509).

Almost surely, 2^31201201105 is an apocalyptic number.

It is an amenable number.

31201201105 is a deficient number, since it is larger than the sum of its proper divisors (7397783039).

31201201105 is a wasteful number, since it uses less digits than its factorization.

31201201105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969636.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 31201201105 its reverse (50110210213), we get a palindrome (81311411318).

The spelling of 31201201105 in words is "thirty-one billion, two hundred one million, two hundred one thousand, one hundred five".