1131223112031 has 4 divisors (see below), whose sum is σ = 1508297482712. Its totient is φ = 754148741352.

The previous prime is 1131223112011. The next prime is 1131223112053. The reversal of 1131223112031 is 1302113221311.

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

It is not a de Polignac number, because 1131223112031 - 2¹¹ = 1131223109983 is a prime.

It is a super-2 number, since 2×1131223112031² (a number of 25 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 = 1131223111989 and 1131223112007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131223112011) 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, 188537185336 + ... + 188537185341.

It is an arithmetic number, because the mean of its divisors is an integer number (377074370678).

Almost surely, 2^{1131223112031} is an apocalyptic number.

1131223112031 is a deficient number, since it is larger than the sum of its proper divisors (377074370681).

1131223112031 is an equidigital number, since it uses as much as digits as its factorization.

1131223112031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377074370680.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1131223112031 its reverse (1302113221311), we get a palindrome (2433336333342).

The spelling of 1131223112031 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-three million, one hundred twelve thousand, thirty-one".