11212013 has 2 divisors, whose sum is σ = 11212014.
Its totient is φ = 11212012.
The previous prime is 11212001. The next prime is 11212037. The reversal of 11212013 is 31021211.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 11202409 + 9604 = 3347^2 + 98^2
It is a cyclic number.
It is not a de Polignac number, because 11212013 - 210 = 11210989 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 11211985 and 11212003.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (11212913) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606006 + 5606007.
It is an arithmetic number, because the mean of its divisors is an integer number (5606007).
Almost surely, 211212013 is an apocalyptic number.
It is an amenable number.
11212013 is a deficient number, since it is larger than the sum of its proper divisors (1).
11212013 is an equidigital number, since it uses as much as digits as its factorization.
11212013 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 12, while the sum is 11.
The square root of 11212013 is about 3348.4344102879.
The cubic root of 11212013 is about 223.8177527517.
Adding to 11212013 its reverse (31021211), we get a palindrome (42233224).
The spelling of 11212013 in words is "eleven million, two hundred twelve thousand, thirteen".