11200019221 has 2 divisors, whose sum is σ = 11200019222. Its totient is φ = 11200019220.

The previous prime is 11200019219. The next prime is 11200019261. The reversal of 11200019221 is 12291000211.

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., 10497027025 + 702992196 = 102455^2 + 26514^2 .

It is a cyclic number.

It is not a de Polignac number, because 11200019221 - 2¹ = 11200019219 is a prime.

Together with 11200019219, 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 (11200019261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600009610 + 5600009611.

It is an arithmetic number, because the mean of its divisors is an integer number (5600009611).

Almost surely, 2^11200019221 is an apocalyptic number.

It is an amenable number.

11200019221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11200019221 is an equidigital number, since it uses as much as digits as its factorization.

11200019221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11200019221 its reverse (12291000211), we get a palindrome (23491019432).

The spelling of 11200019221 in words is "eleven billion, two hundred million, nineteen thousand, two hundred twenty-one".