111001001221213 has 2 divisors, whose sum is σ = 111001001221214. Its totient is φ = 111001001221212.

The previous prime is 111001001221211. The next prime is 111001001221259. The reversal of 111001001221213 is 312122100100111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87642213274564 + 23358787946649 = 9361742^2 + 4833093^2 .

It is a cyclic number.

It is not a de Polignac number, because 111001001221213 - 2¹ = 111001001221211 is a prime.

It is a super-2 number, since 2×111001001221213² (a number of 29 digits) contains 22 as substring.

Together with 111001001221211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111001001221211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500500610606 + 55500500610607.

It is an arithmetic number, because the mean of its divisors is an integer number (55500500610607).

Almost surely, 2^{111001001221213} is an apocalyptic number.

It is an amenable number.

111001001221213 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001001221213 is an equidigital number, since it uses as much as digits as its factorization.

111001001221213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111001001221213 its reverse (312122100100111), we get a palindrome (423123101321324).

The spelling of 111001001221213 in words is "one hundred eleven trillion, one billion, one million, two hundred twenty-one thousand, two hundred thirteen".