11211231112031 has 8 divisors (see below), whose sum is σ = 11233135347840. Its totient is φ = 11189336418328.

The previous prime is 11211231112013. The next prime is 11211231112079. The reversal of 11211231112031 is 13021113211211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11211231112031 - 2¹⁰ = 11211231111007 is a prime.

It is a super-2 number, since 2×11211231112031² (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 = 11211231111994 and 11211231112012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211231115031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31121 + ... + 4735338.

It is an arithmetic number, because the mean of its divisors is an integer number (1404141918480).

Almost surely, 2^{11211231112031} is an apocalyptic number.

11211231112031 is a deficient number, since it is larger than the sum of its proper divisors (21904235809).

11211231112031 is an equidigital number, since it uses as much as digits as its factorization.

11211231112031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4771053.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 11211231112031 its reverse (13021113211211), we get a palindrome (24232344323242).

The spelling of 11211231112031 in words is "eleven trillion, two hundred eleven billion, two hundred thirty-one million, one hundred twelve thousand, thirty-one".