1131331333231 has 4 divisors (see below), whose sum is σ = 1234179636264. Its totient is φ = 1028483030200.

The previous prime is 1131331333213. The next prime is 1131331333241. The reversal of 1131331333231 is 1323331331311.

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 1131331333231 - 2¹³ = 1131331325039 is a prime.

It is a super-2 number, since 2×1131331333231² (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 1131331333231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131331333241) 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, 51424151500 + ... + 51424151521.

It is an arithmetic number, because the mean of its divisors is an integer number (308544909066).

Almost surely, 2^{1131331333231} is an apocalyptic number.

1131331333231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131331333231 is a deficient number, since it is larger than the sum of its proper divisors (102848303033).

1131331333231 is a wasteful number, since it uses less digits than its factorization.

1131331333231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102848303032.

The product of its digits is 4374, while the sum is 28.

Adding to 1131331333231 its reverse (1323331331311), we get a palindrome (2454662664542).

The spelling of 1131331333231 in words is "one trillion, one hundred thirty-one billion, three hundred thirty-one million, three hundred thirty-three thousand, two hundred thirty-one".