11021221247 has 2 divisors, whose sum is σ = 11021221248. Its totient is φ = 11021221246.

The previous prime is 11021221231. The next prime is 11021221273. The reversal of 11021221247 is 74212212011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11021221247 - 2⁴ = 11021221231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11021221207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510610623 + 5510610624.

It is an arithmetic number, because the mean of its divisors is an integer number (5510610624).

Almost surely, 2^11021221247 is an apocalyptic number.

11021221247 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021221247 is an equidigital number, since it uses as much as digits as its factorization.

11021221247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 11021221247 its reverse (74212212011), we get a palindrome (85233433258).

The spelling of 11021221247 in words is "eleven billion, twenty-one million, two hundred twenty-one thousand, two hundred forty-seven".