11001221223409 has 2 divisors, whose sum is σ = 11001221223410. Its totient is φ = 11001221223408.

The previous prime is 11001221223407. The next prime is 11001221223437. The reversal of 11001221223409 is 90432212210011.

It is an a-pointer prime, because the next prime (11001221223437) can be obtained adding 11001221223409 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8615123133409 + 2386098090000 = 2935153^2 + 1544700^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001221223409 - 2¹ = 11001221223407 is a prime.

It is a super-2 number, since 2×11001221223409² (a number of 27 digits) contains 22 as substring.

Together with 11001221223407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11001221223401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500610611704 + 5500610611705.

It is an arithmetic number, because the mean of its divisors is an integer number (5500610611705).

Almost surely, 2^{11001221223409} is an apocalyptic number.

It is an amenable number.

11001221223409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001221223409 is an equidigital number, since it uses as much as digits as its factorization.

11001221223409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 11001221223409 in words is "eleven trillion, one billion, two hundred twenty-one million, two hundred twenty-three thousand, four hundred nine".