11473013221 has 2 divisors, whose sum is σ = 11473013222. Its totient is φ = 11473013220.

The previous prime is 11473013197. The next prime is 11473013281. The reversal of 11473013221 is 12231037411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10611884196 + 861129025 = 103014^2 + 29345^2 .

It is an emirp because it is prime and its reverse (12231037411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11473013221 - 2⁹ = 11473012709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11473013281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5736506610 + 5736506611.

It is an arithmetic number, because the mean of its divisors is an integer number (5736506611).

Almost surely, 2^11473013221 is an apocalyptic number.

It is an amenable number.

11473013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11473013221 is an equidigital number, since it uses as much as digits as its factorization.

11473013221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The spelling of 11473013221 in words is "eleven billion, four hundred seventy-three million, thirteen thousand, two hundred twenty-one".