31321312231111 has 8 divisors (see below), whose sum is σ = 36950488162304. Its totient is φ = 25980811988760.

The previous prime is 31321312231073. The next prime is 31321312231213. The reversal of 31321312231111 is 11113221312313.

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

It is a cyclic number.

It is not a de Polignac number, because 31321312231111 - 2¹⁹ = 31321311706823 is a prime.

It is a super-3 number, since 3×31321312231111³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31325312231111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72168921975 + ... + 72168922408.

It is an arithmetic number, because the mean of its divisors is an integer number (4618811020288).

Almost surely, 2^{31321312231111} is an apocalyptic number.

31321312231111 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31321312231111 is a deficient number, since it is larger than the sum of its proper divisors (5629175931193).

31321312231111 is a wasteful number, since it uses less digits than its factorization.

31321312231111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144337844421.

The product of its digits is 648, while the sum is 25.

Adding to 31321312231111 its reverse (11113221312313), we get a palindrome (42434533543424).

The spelling of 31321312231111 in words is "thirty-one trillion, three hundred twenty-one billion, three hundred twelve million, two hundred thirty-one thousand, one hundred eleven".