1131223132331 has 4 divisors (see below), whose sum is σ = 1131226600152. Its totient is φ = 1131219664512.

The previous prime is 1131223132321. The next prime is 1131223132357. The reversal of 1131223132331 is 1332313221311.

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 1131223132331 - 2²² = 1131218938027 is a prime.

It is a super-2 number, since 2×1131223132331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131223132331.

It is not an unprimeable number, because it can be changed into a prime (1131223132321) 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, 1187126 + ... + 1916171.

It is an arithmetic number, because the mean of its divisors is an integer number (282806650038).

Almost surely, 2^{1131223132331} is an apocalyptic number.

1131223132331 is a deficient number, since it is larger than the sum of its proper divisors (3467821).

1131223132331 is an equidigital number, since it uses as much as digits as its factorization.

1131223132331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3467820.

The product of its digits is 1944, while the sum is 26.

Adding to 1131223132331 its reverse (1332313221311), we get a palindrome (2463536353642).

The spelling of 1131223132331 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-three million, one hundred thirty-two thousand, three hundred thirty-one".