20113133111031 has 4 divisors (see below), whose sum is σ = 26817510814712. Its totient is φ = 13408755407352.

The previous prime is 20113133111021. The next prime is 20113133111033. The reversal of 20113133111031 is 13011133131102.

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

It is not a de Polignac number, because 20113133111031 - 2¹⁴ = 20113133094647 is a prime.

It is a super-2 number, since 2×20113133111031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20113133110989 and 20113133111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113133111033) 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, 3352188851836 + ... + 3352188851841.

It is an arithmetic number, because the mean of its divisors is an integer number (6704377703678).

Almost surely, 2^{20113133111031} is an apocalyptic number.

20113133111031 is a deficient number, since it is larger than the sum of its proper divisors (6704377703681).

20113133111031 is an equidigital number, since it uses as much as digits as its factorization.

20113133111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704377703680.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 20113133111031 its reverse (13011133131102), we get a palindrome (33124266242133).

The spelling of 20113133111031 in words is "twenty trillion, one hundred thirteen billion, one hundred thirty-three million, one hundred eleven thousand, thirty-one".