20113031231311 has 4 divisors (see below), whose sum is σ = 20453930065800. Its totient is φ = 19772132396824.

The previous prime is 20113031231303. The next prime is 20113031231327. The reversal of 20113031231311 is 11313213031102.

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

It is a cyclic number.

It is not a de Polignac number, because 20113031231311 - 2³ = 20113031231303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113031232311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170449417156 + ... + 170449417273.

It is an arithmetic number, because the mean of its divisors is an integer number (5113482516450).

Almost surely, 2^{20113031231311} is an apocalyptic number.

20113031231311 is a deficient number, since it is larger than the sum of its proper divisors (340898834489).

20113031231311 is an equidigital number, since it uses as much as digits as its factorization.

20113031231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340898834488.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 20113031231311 its reverse (11313213031102), we get a palindrome (31426244262413).

The spelling of 20113031231311 in words is "twenty trillion, one hundred thirteen billion, thirty-one million, two hundred thirty-one thousand, three hundred eleven".