1131213322031 has 4 divisors (see below), whose sum is σ = 1218229731432. Its totient is φ = 1044196912632.

The previous prime is 1131213322007. The next prime is 1131213322081. The reversal of 1131213322031 is 1302233121311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131213322031 is a prime.

It is a super-2 number, since 2×1131213322031² (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 = 1131213321988 and 1131213322006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131213322081) 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, 43508204681 + ... + 43508204706.

It is an arithmetic number, because the mean of its divisors is an integer number (304557432858).

Almost surely, 2^{1131213322031} is an apocalyptic number.

1131213322031 is a deficient number, since it is larger than the sum of its proper divisors (87016409401).

1131213322031 is an equidigital number, since it uses as much as digits as its factorization.

1131213322031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87016409400.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1131213322031 its reverse (1302233121311), we get a palindrome (2433446443342).

The spelling of 1131213322031 in words is "one trillion, one hundred thirty-one billion, two hundred thirteen million, three hundred twenty-two thousand, thirty-one".