11312103221 has 2 divisors, whose sum is σ = 11312103222. Its totient is φ = 11312103220.

The previous prime is 11312103211. The next prime is 11312103247. The reversal of 11312103221 is 12230121311.

11312103221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7514462596 + 3797640625 = 86686^2 + 61625^2 .

It is a cyclic number.

It is not a de Polignac number, because 11312103221 - 2⁶ = 11312103157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11312103221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11312103211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656051610 + 5656051611.

It is an arithmetic number, because the mean of its divisors is an integer number (5656051611).

Almost surely, 2^11312103221 is an apocalyptic number.

It is an amenable number.

11312103221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312103221 is an equidigital number, since it uses as much as digits as its factorization.

11312103221 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 17.

Adding to 11312103221 its reverse (12230121311), we get a palindrome (23542224532).

The spelling of 11312103221 in words is "eleven billion, three hundred twelve million, one hundred three thousand, two hundred twenty-one".