31312321212311 has 8 divisors (see below), whose sum is σ = 33168135311424. Its totient is φ = 29458052985600.

The previous prime is 31312321212307. The next prime is 31312321212313. The reversal of 31312321212311 is 11321212321313.

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 31312321212311 - 2² = 31312321212307 is a prime.

It is a super-2 number, since 2×31312321212311² (a number of 28 digits) contains 22 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 (31312321212313) 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, 386426390 + ... + 386507411.

It is an arithmetic number, because the mean of its divisors is an integer number (4146016913928).

Almost surely, 2^{31312321212311} is an apocalyptic number.

31312321212311 is a deficient number, since it is larger than the sum of its proper divisors (1855814099113).

31312321212311 is a wasteful number, since it uses less digits than its factorization.

31312321212311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772936201.

The product of its digits is 1296, while the sum is 26.

Adding to 31312321212311 its reverse (11321212321313), we get a palindrome (42633533533624).

The spelling of 31312321212311 in words is "thirty-one trillion, three hundred twelve billion, three hundred twenty-one million, two hundred twelve thousand, three hundred eleven".