31203230123 has 16 divisors (see below), whose sum is σ = 34247689056. Its totient is φ = 28251125760.

The previous prime is 31203230087. The next prime is 31203230131. The reversal of 31203230123 is 32103230213.

It is not a de Polignac number, because 31203230123 - 2¹⁸ = 31202967979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31203230095 and 31203230104.

It is not an unprimeable number, because it can be changed into a prime (31203230153) 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 15 ways as a sum of consecutive naturals, for example, 4468811 + ... + 4475787.

It is an arithmetic number, because the mean of its divisors is an integer number (2140480566).

Almost surely, 2^31203230123 is an apocalyptic number.

31203230123 is a deficient number, since it is larger than the sum of its proper divisors (3044458933).

31203230123 is a wasteful number, since it uses less digits than its factorization.

31203230123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13534.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31203230123 its reverse (32103230213), we get a palindrome (63306460336).

The spelling of 31203230123 in words is "thirty-one billion, two hundred three million, two hundred thirty thousand, one hundred twenty-three".