11200400221 has 2 divisors, whose sum is σ = 11200400222. Its totient is φ = 11200400220.

The previous prime is 11200400209. The next prime is 11200400291. The reversal of 11200400221 is 12200400211.

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., 11064094596 + 136305625 = 105186^2 + 11675^2 .

It is an emirp because it is prime and its reverse (12200400211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11200400221 - 2¹¹ = 11200398173 is a prime.

It is a super-2 number, since 2×11200400221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11200400201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600200110 + 5600200111.

It is an arithmetic number, because the mean of its divisors is an integer number (5600200111).

Almost surely, 2^11200400221 is an apocalyptic number.

It is an amenable number.

11200400221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11200400221 is an equidigital number, since it uses as much as digits as its factorization.

11200400221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 11200400221 its reverse (12200400211), we get a palindrome (23400800432).

The spelling of 11200400221 in words is "eleven billion, two hundred million, four hundred thousand, two hundred twenty-one".