312121203210023 has 2 divisors, whose sum is σ = 312121203210024. Its totient is φ = 312121203210022.

The previous prime is 312121203209989. The next prime is 312121203210049. The reversal of 312121203210023 is 320012302121213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312121203210023 - 2¹⁰ = 312121203208999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312121203210053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156060601605011 + 156060601605012.

It is an arithmetic number, because the mean of its divisors is an integer number (156060601605012).

Almost surely, 2^{312121203210023} is an apocalyptic number.

312121203210023 is a deficient number, since it is larger than the sum of its proper divisors (1).

312121203210023 is an equidigital number, since it uses as much as digits as its factorization.

312121203210023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 312121203210023 its reverse (320012302121213), we get a palindrome (632133505331236).

The spelling of 312121203210023 in words is "three hundred twelve trillion, one hundred twenty-one billion, two hundred three million, two hundred ten thousand, twenty-three".