1131331032231 has 4 divisors (see below), whose sum is σ = 1508441376312. Its totient is φ = 754220688152.

The previous prime is 1131331032197. The next prime is 1131331032263. The reversal of 1131331032231 is 1322301331311.

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 1131331032231 - 2¹⁷ = 1131330901159 is a prime.

It is a super-2 number, since 2×1131331032231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131331032281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188555172036 + ... + 188555172041.

It is an arithmetic number, because the mean of its divisors is an integer number (377110344078).

Almost surely, 2^{1131331032231} is an apocalyptic number.

1131331032231 is a deficient number, since it is larger than the sum of its proper divisors (377110344081).

1131331032231 is an equidigital number, since it uses as much as digits as its factorization.

1131331032231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377110344080.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 1131331032231 its reverse (1322301331311), we get a palindrome (2453632363542).

The spelling of 1131331032231 in words is "one trillion, one hundred thirty-one billion, three hundred thirty-one million, thirty-two thousand, two hundred thirty-one".