11331121222331 has 2 divisors, whose sum is σ = 11331121222332. Its totient is φ = 11331121222330.

The previous prime is 11331121222303. The next prime is 11331121222417. The reversal of 11331121222331 is 13322212113311.

It is a weak prime.

It is an emirp because it is prime and its reverse (13322212113311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11331121222331 is a prime.

It is a super-2 number, since 2×11331121222331² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11331121222331.

It is not a weakly prime, because it can be changed into another prime (11331121222301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665560611165 + 5665560611166.

It is an arithmetic number, because the mean of its divisors is an integer number (5665560611166).

Almost surely, 2^{11331121222331} is an apocalyptic number.

11331121222331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331121222331 is an equidigital number, since it uses as much as digits as its factorization.

11331121222331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

Adding to 11331121222331 its reverse (13322212113311), we get a palindrome (24653333335642).

The spelling of 11331121222331 in words is "eleven trillion, three hundred thirty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, three hundred thirty-one".