1131232211231 has 4 divisors (see below), whose sum is σ = 1150405638600. Its totient is φ = 1112058783864.

The previous prime is 1131232211201. The next prime is 1131232211251. The reversal of 1131232211231 is 1321122321311.

It is a happy number.

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 1131232211231 - 2¹⁴ = 1131232194847 is a prime.

It is a super-2 number, since 2×1131232211231² (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 = 1131232211197 and 1131232211206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131232211201) 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, 9586713596 + ... + 9586713713.

It is an arithmetic number, because the mean of its divisors is an integer number (287601409650).

Almost surely, 2^{1131232211231} is an apocalyptic number.

1131232211231 is a deficient number, since it is larger than the sum of its proper divisors (19173427369).

1131232211231 is an equidigital number, since it uses as much as digits as its factorization.

1131232211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19173427368.

The product of its digits is 432, while the sum is 23.

Adding to 1131232211231 its reverse (1321122321311), we get a palindrome (2452354532542).

The spelling of 1131232211231 in words is "one trillion, one hundred thirty-one billion, two hundred thirty-two million, two hundred eleven thousand, two hundred thirty-one".