111121331213 has 2 divisors, whose sum is σ = 111121331214. Its totient is φ = 111121331212.

The previous prime is 111121331173. The next prime is 111121331227. The reversal of 111121331213 is 312133121111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105249634084 + 5871697129 = 324422^2 + 76627^2 .

It is a cyclic number.

It is not a de Polignac number, because 111121331213 - 2¹² = 111121327117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111121351213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560665606 + 55560665607.

It is an arithmetic number, because the mean of its divisors is an integer number (55560665607).

Almost surely, 2^111121331213 is an apocalyptic number.

It is an amenable number.

111121331213 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121331213 is an equidigital number, since it uses as much as digits as its factorization.

111121331213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 20.

Adding to 111121331213 its reverse (312133121111), we get a palindrome (423254452324).

The spelling of 111121331213 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred thirteen".