31310121311 has 8 divisors (see below), whose sum is σ = 35786561184. Its totient is φ = 26834572800.

The previous prime is 31310121289. The next prime is 31310121343. The reversal of 31310121311 is 11312101313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31310121311 - 2¹⁰ = 31310120287 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 31310121311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31310121391) 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 7 ways as a sum of consecutive naturals, for example, 145790 + ... + 289611.

It is an arithmetic number, because the mean of its divisors is an integer number (4473320148).

Almost surely, 2^31310121311 is an apocalyptic number.

31310121311 is a deficient number, since it is larger than the sum of its proper divisors (4476439873).

31310121311 is a wasteful number, since it uses less digits than its factorization.

31310121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445681.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31310121311 its reverse (11312101313), we get a palindrome (42622222624).

The spelling of 31310121311 in words is "thirty-one billion, three hundred ten million, one hundred twenty-one thousand, three hundred eleven".