31321320100123 has 2 divisors, whose sum is σ = 31321320100124. Its totient is φ = 31321320100122.

The previous prime is 31321320100087. The next prime is 31321320100129. The reversal of 31321320100123 is 32100102312313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31321320100123 - 2²⁵ = 31321286545691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31321320100094 and 31321320100103.

It is not a weakly prime, because it can be changed into another prime (31321320100129) 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 as a sum of consecutive naturals, namely, 15660660050061 + 15660660050062.

It is an arithmetic number, because the mean of its divisors is an integer number (15660660050062).

Almost surely, 2^{31321320100123} is an apocalyptic number.

31321320100123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321320100123 is an equidigital number, since it uses as much as digits as its factorization.

31321320100123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31321320100123 its reverse (32100102312313), we get a palindrome (63421422412436).

The spelling of 31321320100123 in words is "thirty-one trillion, three hundred twenty-one billion, three hundred twenty million, one hundred thousand, one hundred twenty-three".