31123303123 has 8 divisors (see below), whose sum is σ = 33962213376. Its totient is φ = 28285979400.

The previous prime is 31123303109. The next prime is 31123303147. The reversal of 31123303123 is 32130332113.

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-31123303123 is a prime.

It is a super-2 number, since 2×31123303123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31123303094 and 31123303103.

It is not an unprimeable number, because it can be changed into a prime (31123303103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355423 + ... + 434248.

It is an arithmetic number, because the mean of its divisors is an integer number (4245276672).

Almost surely, 2^31123303123 is an apocalyptic number.

31123303123 is a deficient number, since it is larger than the sum of its proper divisors (2838910253).

31123303123 is a wasteful number, since it uses less digits than its factorization.

31123303123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793265.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31123303123 its reverse (32130332113), we get a palindrome (63253635236).

The spelling of 31123303123 in words is "thirty-one billion, one hundred twenty-three million, three hundred three thousand, one hundred twenty-three".