11221217904971 has 2 divisors, whose sum is σ = 11221217904972. Its totient is φ = 11221217904970.

The previous prime is 11221217904961. The next prime is 11221217905003. The reversal of 11221217904971 is 17940971212211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11221217904971 - 2²² = 11221213710667 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221217904961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610608952485 + 5610608952486.

It is an arithmetic number, because the mean of its divisors is an integer number (5610608952486).

Almost surely, 2^{11221217904971} is an apocalyptic number.

11221217904971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221217904971 is an equidigital number, since it uses as much as digits as its factorization.

11221217904971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 47.

The spelling of 11221217904971 in words is "eleven trillion, two hundred twenty-one billion, two hundred seventeen million, nine hundred four thousand, nine hundred seventy-one".