31200032120123 has 2 divisors, whose sum is σ = 31200032120124. Its totient is φ = 31200032120122.

The previous prime is 31200032120057. The next prime is 31200032120137. The reversal of 31200032120123 is 32102123000213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31200032120123 - 2¹⁸ = 31200031857979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31200032120095 and 31200032120104.

It is not a weakly prime, because it can be changed into another prime (31200032120183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600016060061 + 15600016060062.

It is an arithmetic number, because the mean of its divisors is an integer number (15600016060062).

Almost surely, 2^{31200032120123} is an apocalyptic number.

31200032120123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31200032120123 is an equidigital number, since it uses as much as digits as its factorization.

31200032120123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31200032120123 its reverse (32102123000213), we get a palindrome (63302155120336).

The spelling of 31200032120123 in words is "thirty-one trillion, two hundred billion, thirty-two million, one hundred twenty thousand, one hundred twenty-three".