31123033123 has 8 divisors (see below), whose sum is σ = 38305271648. Its totient is φ = 24624817344.

The previous prime is 31123033103. The next prime is 31123033147. The reversal of 31123033123 is 32133032113.

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-31123033123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31123033094 and 31123033103.

It is not an unprimeable number, because it can be changed into a prime (31123033103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171005586 + ... + 171005767.

It is an arithmetic number, because the mean of its divisors is an integer number (4788158956).

Almost surely, 2^31123033123 is an apocalyptic number.

31123033123 is a deficient number, since it is larger than the sum of its proper divisors (7182238525).

31123033123 is a wasteful number, since it uses less digits than its factorization.

31123033123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342011373.

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

Adding to 31123033123 its reverse (32133032113), we get a palindrome (63256065236).

The spelling of 31123033123 in words is "thirty-one billion, one hundred twenty-three million, thirty-three thousand, one hundred twenty-three".