31230202123 has 2 divisors, whose sum is σ = 31230202124. Its totient is φ = 31230202122.

The previous prime is 31230202061. The next prime is 31230202139. The reversal of 31230202123 is 32120203213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31230202123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31230202123.

It is not a weakly prime, because it can be changed into another prime (31230202163) 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 as a sum of consecutive naturals, namely, 15615101061 + 15615101062.

It is an arithmetic number, because the mean of its divisors is an integer number (15615101062).

Almost surely, 2^31230202123 is an apocalyptic number.

31230202123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230202123 is an equidigital number, since it uses as much as digits as its factorization.

31230202123 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 19.

Adding to 31230202123 its reverse (32120203213), we get a palindrome (63350405336).

The spelling of 31230202123 in words is "thirty-one billion, two hundred thirty million, two hundred two thousand, one hundred twenty-three".