11502225221 has 2 divisors, whose sum is σ = 11502225222. Its totient is φ = 11502225220.

The previous prime is 11502225179. The next prime is 11502225233. The reversal of 11502225221 is 12252220511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9027660196 + 2474565025 = 95014^2 + 49745^2 .

It is a cyclic number.

It is not a de Polignac number, because 11502225221 - 2²² = 11498030917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11502225421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5751112610 + 5751112611.

It is an arithmetic number, because the mean of its divisors is an integer number (5751112611).

Almost surely, 2^11502225221 is an apocalyptic number.

It is an amenable number.

11502225221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11502225221 is an equidigital number, since it uses as much as digits as its factorization.

11502225221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 11502225221 its reverse (12252220511), we get a palindrome (23754445732).

The spelling of 11502225221 in words is "eleven billion, five hundred two million, two hundred twenty-five thousand, two hundred twenty-one".