20121323311303 has 2 divisors, whose sum is σ = 20121323311304. Its totient is φ = 20121323311302.

The previous prime is 20121323311279. The next prime is 20121323311307. The reversal of 20121323311303 is 30311332312102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121323311303 - 2²⁵ = 20121289756871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121323311307) 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, 10060661655651 + 10060661655652.

It is an arithmetic number, because the mean of its divisors is an integer number (10060661655652).

Almost surely, 2^{20121323311303} is an apocalyptic number.

20121323311303 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121323311303 is an equidigital number, since it uses as much as digits as its factorization.

20121323311303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 20121323311303 its reverse (30311332312102), we get a palindrome (50432655623405).

The spelling of 20121323311303 in words is "twenty trillion, one hundred twenty-one billion, three hundred twenty-three million, three hundred eleven thousand, three hundred three".