20113033133231 has 2 divisors, whose sum is σ = 20113033133232. Its totient is φ = 20113033133230.

The previous prime is 20113033133177. The next prime is 20113033133233. The reversal of 20113033133231 is 13233133031102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20113033133231 is a prime.

It is a super-2 number, since 2×20113033133231² (a number of 27 digits) contains 22 as substring.

Together with 20113033133233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20113033133231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113033133233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056516566615 + 10056516566616.

It is an arithmetic number, because the mean of its divisors is an integer number (10056516566616).

Almost surely, 2^{20113033133231} is an apocalyptic number.

20113033133231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113033133231 is an equidigital number, since it uses as much as digits as its factorization.

20113033133231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 20113033133231 its reverse (13233133031102), we get a palindrome (33346166164333).

The spelling of 20113033133231 in words is "twenty trillion, one hundred thirteen billion, thirty-three million, one hundred thirty-three thousand, two hundred thirty-one".