11331131223031 has 4 divisors (see below), whose sum is σ = 11374215372432. Its totient is φ = 11288047073632.

The previous prime is 11331131222981. The next prime is 11331131223053. The reversal of 11331131223031 is 13032213113311.

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 11331131223031 - 2³⁷ = 11193692269559 is a prime.

It is a super-3 number, since 3×11331131223031³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11331131222987 and 11331131223005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331131223931) 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, 21542074306 + ... + 21542074831.

It is an arithmetic number, because the mean of its divisors is an integer number (2843553843108).

Almost surely, 2^{11331131223031} is an apocalyptic number.

11331131223031 is a deficient number, since it is larger than the sum of its proper divisors (43084149401).

11331131223031 is an equidigital number, since it uses as much as digits as its factorization.

11331131223031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43084149400.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 11331131223031 its reverse (13032213113311), we get a palindrome (24363344336342).

The spelling of 11331131223031 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, two hundred twenty-three thousand, thirty-one".