31023021331331 has 8 divisors (see below), whose sum is σ = 31220763565200. Its totient is φ = 30825280912608.

The previous prime is 31023021331273. The next prime is 31023021331369. The reversal of 31023021331331 is 13313312032013.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31023021331331 is a prime.

It is a super-2 number, since 2×31023021331331² (a number of 28 digits) contains 22 as substring.

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 31023021331331.

It is not an unprimeable number, because it can be changed into a prime (31023021301331) 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, 56697845 + ... + 57242393.

It is an arithmetic number, because the mean of its divisors is an integer number (3902595445650).

Almost surely, 2^{31023021331331} is an apocalyptic number.

31023021331331 is a deficient number, since it is larger than the sum of its proper divisors (197742233869).

31023021331331 is a wasteful number, since it uses less digits than its factorization.

31023021331331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907573.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31023021331331 its reverse (13313312032013), we get a palindrome (44336333363344).

The spelling of 31023021331331 in words is "thirty-one trillion, twenty-three billion, twenty-one million, three hundred thirty-one thousand, three hundred thirty-one".