31223123133 has 8 divisors (see below), whose sum is σ = 42043017696. Its totient is φ = 20609322000.

The previous prime is 31223123053. The next prime is 31223123137. The reversal of 31223123133 is 33132132213.

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

It is not a de Polignac number, because 31223123133 - 2⁹ = 31223122621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223123137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51523003 + ... + 51523608.

It is an arithmetic number, because the mean of its divisors is an integer number (5255377212).

Almost surely, 2^31223123133 is an apocalyptic number.

It is an amenable number.

31223123133 is a deficient number, since it is larger than the sum of its proper divisors (10819894563).

31223123133 is a wasteful number, since it uses less digits than its factorization.

31223123133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103046715.

The product of its digits is 1944, while the sum is 24.

Adding to 31223123133 its reverse (33132132213), we get a palindrome (64355255346).

The spelling of 31223123133 in words is "thirty-one billion, two hundred twenty-three million, one hundred twenty-three thousand, one hundred thirty-three".