111311331331331 has 2 divisors, whose sum is σ = 111311331331332. Its totient is φ = 111311331331330.

The previous prime is 111311331331271. The next prime is 111311331331337. The reversal of 111311331331331 is 133133133113111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111311331331331 - 2²² = 111311327137027 is a prime.

It is a super-2 number, since 2×111311331331331² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111311331331294 and 111311331331303.

It is not a weakly prime, because it can be changed into another prime (111311331331337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55655665665665 + 55655665665666.

It is an arithmetic number, because the mean of its divisors is an integer number (55655665665666).

Almost surely, 2^{111311331331331} is an apocalyptic number.

111311331331331 is a deficient number, since it is larger than the sum of its proper divisors (1).

111311331331331 is an equidigital number, since it uses as much as digits as its factorization.

111311331331331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2187, while the sum is 29.

Adding to 111311331331331 its reverse (133133133113111), we get a palindrome (244444464444442).

The spelling of 111311331331331 in words is "one hundred eleven trillion, three hundred eleven billion, three hundred thirty-one million, three hundred thirty-one thousand, three hundred thirty-one".