11011221019969 has 2 divisors, whose sum is σ = 11011221019970. Its totient is φ = 11011221019968.

The previous prime is 11011221019937. The next prime is 11011221020021. The reversal of 11011221019969 is 96991012211011.

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., 10071895640625 + 939325379344 = 3173625^2 + 969188^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011221019969 - 2⁵ = 11011221019937 is a prime.

It is a super-2 number, since 2×11011221019969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11011221019769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505610509984 + 5505610509985.

It is an arithmetic number, because the mean of its divisors is an integer number (5505610509985).

Almost surely, 2^{11011221019969} is an apocalyptic number.

It is an amenable number.

11011221019969 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011221019969 is an equidigital number, since it uses as much as digits as its factorization.

11011221019969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 43.

The spelling of 11011221019969 in words is "eleven trillion, eleven billion, two hundred twenty-one million, nineteen thousand, nine hundred sixty-nine".