31311323033321 has 4 divisors (see below), whose sum is σ = 31312404217044. Its totient is φ = 31310241849600.

The previous prime is 31311323033311. The next prime is 31311323033327. The reversal of 31311323033321 is 12333032311313.

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 14395870167721 + 16915452865600 = 3794189^2 + 4112840^2 .

It is a cyclic number.

It is not a de Polignac number, because 31311323033321 - 2⁴² = 26913276522217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311323033327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540548420 + ... + 540606341.

It is an arithmetic number, because the mean of its divisors is an integer number (7828101054261).

Almost surely, 2^{31311323033321} is an apocalyptic number.

It is an amenable number.

31311323033321 is a deficient number, since it is larger than the sum of its proper divisors (1081183723).

31311323033321 is a wasteful number, since it uses less digits than its factorization.

31311323033321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081183722.

The product of its (nonzero) digits is 8748, while the sum is 29.

Adding to 31311323033321 its reverse (12333032311313), we get a palindrome (43644355344634).

The spelling of 31311323033321 in words is "thirty-one trillion, three hundred eleven billion, three hundred twenty-three million, thirty-three thousand, three hundred twenty-one".