11000013221 has 2 divisors, whose sum is σ = 11000013222. Its totient is φ = 11000013220.

The previous prime is 11000013139. The next prime is 11000013239. The reversal of 11000013221 is 12231000011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6298168321 + 4701844900 = 79361^2 + 68570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11000013221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11000013721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500006610 + 5500006611.

It is an arithmetic number, because the mean of its divisors is an integer number (5500006611).

Almost surely, 2^11000013221 is an apocalyptic number.

It is an amenable number.

11000013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000013221 is an equidigital number, since it uses as much as digits as its factorization.

11000013221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 11000013221 its reverse (12231000011), we get a palindrome (23231013232).

The spelling of 11000013221 in words is "eleven billion, thirteen thousand, two hundred twenty-one".