111211102120331 has 2 divisors, whose sum is σ = 111211102120332. Its totient is φ = 111211102120330.

The previous prime is 111211102120297. The next prime is 111211102120427. The reversal of 111211102120331 is 133021201112111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111211102120331 is a prime.

It is a super-2 number, since 2×111211102120331² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111211102120231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605551060165 + 55605551060166.

It is an arithmetic number, because the mean of its divisors is an integer number (55605551060166).

Almost surely, 2^{111211102120331} is an apocalyptic number.

111211102120331 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211102120331 is an equidigital number, since it uses as much as digits as its factorization.

111211102120331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 111211102120331 its reverse (133021201112111), we get a palindrome (244232303232442).

The spelling of 111211102120331 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred two million, one hundred twenty thousand, three hundred thirty-one".