31300120105 has 4 divisors (see below), whose sum is σ = 37560144132. Its totient is φ = 25040096080.

The previous prime is 31300120087. The next prime is 31300120133. The reversal of 31300120105 is 50102100313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16935378496 + 14364741609 = 130136^2 + 119853^2 .

It is not a de Polignac number, because 31300120105 - 2²¹ = 31298022953 is a prime.

It is a super-2 number, since 2×31300120105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3130012006 + ... + 3130012015.

It is an arithmetic number, because the mean of its divisors is an integer number (9390036033).

Almost surely, 2^31300120105 is an apocalyptic number.

It is an amenable number.

31300120105 is a deficient number, since it is larger than the sum of its proper divisors (6260024027).

31300120105 is an equidigital number, since it uses as much as digits as its factorization.

31300120105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260024026.

The product of its (nonzero) digits is 90, while the sum is 16.

Adding to 31300120105 its reverse (50102100313), we get a palindrome (81402220418).

The spelling of 31300120105 in words is "thirty-one billion, three hundred million, one hundred twenty thousand, one hundred five".