31320103211 has 4 divisors (see below), whose sum is σ = 32400106800. Its totient is φ = 30240099624.

The previous prime is 31320103201. The next prime is 31320103219. The reversal of 31320103211 is 11230102313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11230102313 = 353 ⋅31813321.

It is a de Polignac number, because none of the positive numbers 2^k-31320103211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31320103211.

It is not an unprimeable number, because it can be changed into a prime (31320103219) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 540001751 + ... + 540001808.

It is an arithmetic number, because the mean of its divisors is an integer number (8100026700).

Almost surely, 2^31320103211 is an apocalyptic number.

31320103211 is a deficient number, since it is larger than the sum of its proper divisors (1080003589).

31320103211 is a wasteful number, since it uses less digits than its factorization.

31320103211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080003588.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31320103211 its reverse (11230102313), we get a palindrome (42550205524).

The spelling of 31320103211 in words is "thirty-one billion, three hundred twenty million, one hundred three thousand, two hundred eleven".