31200130123 has 4 divisors (see below), whose sum is σ = 31711607728. Its totient is φ = 30688652520.

The previous prime is 31200130081. The next prime is 31200130187. The reversal of 31200130123 is 32103100213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32103100213 = 307 ⋅104570359.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31200130123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31200130097 and 31200130106.

It is not an unprimeable number, because it can be changed into a prime (31200133123) 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 3 ways as a sum of consecutive naturals, for example, 255738711 + ... + 255738832.

It is an arithmetic number, because the mean of its divisors is an integer number (7927901932).

Almost surely, 2^31200130123 is an apocalyptic number.

31200130123 is a deficient number, since it is larger than the sum of its proper divisors (511477605).

31200130123 is an equidigital number, since it uses as much as digits as its factorization.

31200130123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511477604.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31200130123 its reverse (32103100213), we get a palindrome (63303230336).

The spelling of 31200130123 in words is "thirty-one billion, two hundred million, one hundred thirty thousand, one hundred twenty-three".