31123311023 has 8 divisors (see below), whose sum is σ = 35605912992. Its totient is φ = 26649812736.

The previous prime is 31123311013. The next prime is 31123311031. The reversal of 31123311023 is 32011332113.

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

It is a cyclic number.

It is not a de Polignac number, because 31123311023 - 2⁸ = 31123310767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31123310986 and 31123311004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123311013) 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, 2268590 + ... + 2282267.

It is an arithmetic number, because the mean of its divisors is an integer number (4450739124).

Almost surely, 2^31123311023 is an apocalyptic number.

31123311023 is a deficient number, since it is larger than the sum of its proper divisors (4482601969).

31123311023 is an equidigital number, since it uses as much as digits as its factorization.

31123311023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4551841.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31123311023 its reverse (32011332113), we get a palindrome (63134643136).

The spelling of 31123311023 in words is "thirty-one billion, one hundred twenty-three million, three hundred eleven thousand, twenty-three".