1131232212231 has 32 divisors (see below), whose sum is σ = 1681071694848. Its totient is φ = 670755027840.

The previous prime is 1131232212217. The next prime is 1131232212241. The reversal of 1131232212231 is 1322122321311.

It is not a de Polignac number, because 1131232212231 - 2⁵ = 1131232212199 is a prime.

It is a super-2 number, since 2×1131232212231² (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 (1131232212241) 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 31 ways as a sum of consecutive naturals, for example, 4015801 + ... + 4288253.

It is an arithmetic number, because the mean of its divisors is an integer number (52533490464).

Almost surely, 2^{1131232212231} is an apocalyptic number.

1131232212231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131232212231 is a deficient number, since it is larger than the sum of its proper divisors (549839482617).

1131232212231 is a wasteful number, since it uses less digits than its factorization.

1131232212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275191.

The product of its digits is 864, while the sum is 24.

Adding to 1131232212231 its reverse (1322122321311), we get a palindrome (2453354533542).

The spelling of 1131232212231 in words is "one trillion, one hundred thirty-one billion, two hundred thirty-two million, two hundred twelve thousand, two hundred thirty-one".