20231111131031 has 4 divisors (see below), whose sum is σ = 20237507312232. Its totient is φ = 20224714949832.

The previous prime is 20231111131027. The next prime is 20231111131057. The reversal of 20231111131031 is 13013111113202.

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 20231111131031 - 2² = 20231111131027 is a prime.

It is a super-2 number, since 2×20231111131031² (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 = 20231111130994 and 20231111131012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231111131081) 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, 3198085856 + ... + 3198092181.

It is an arithmetic number, because the mean of its divisors is an integer number (5059376828058).

Almost surely, 2^{20231111131031} is an apocalyptic number.

20231111131031 is a deficient number, since it is larger than the sum of its proper divisors (6396181201).

20231111131031 is an equidigital number, since it uses as much as digits as its factorization.

20231111131031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6396181200.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 20231111131031 its reverse (13013111113202), we get a palindrome (33244222244233).

The spelling of 20231111131031 in words is "twenty trillion, two hundred thirty-one billion, one hundred eleven million, one hundred thirty-one thousand, thirty-one".