20203312212311 has 4 divisors (see below), whose sum is σ = 20203531998624. Its totient is φ = 20203092426000.

The previous prime is 20203312212277. The next prime is 20203312212323. The reversal of 20203312212311 is 11321221330202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20203312212311 is a prime.

It is a super-2 number, since 2×20203312212311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203312212011) 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 in 3 ways as a sum of consecutive naturals, for example, 109755215 + ... + 109939136.

It is an arithmetic number, because the mean of its divisors is an integer number (5050882999656).

Almost surely, 2^{20203312212311} is an apocalyptic number.

20203312212311 is a deficient number, since it is larger than the sum of its proper divisors (219786313).

20203312212311 is an equidigital number, since it uses as much as digits as its factorization.

20203312212311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219786312.

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

Adding to 20203312212311 its reverse (11321221330202), we get a palindrome (31524533542513).

The spelling of 20203312212311 in words is "twenty trillion, two hundred three billion, three hundred twelve million, two hundred twelve thousand, three hundred eleven".