11020776721 has 2 divisors, whose sum is σ = 11020776722. Its totient is φ = 11020776720.

The previous prime is 11020776631. The next prime is 11020776733. The reversal of 11020776721 is 12767702011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9310127121 + 1710649600 = 96489^2 + 41360^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020776721 - 2²¹ = 11018679569 is a prime.

It is not a weakly prime, because it can be changed into another prime (11020776751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510388360 + 5510388361.

It is an arithmetic number, because the mean of its divisors is an integer number (5510388361).

Almost surely, 2^11020776721 is an apocalyptic number.

It is an amenable number.

11020776721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020776721 is an equidigital number, since it uses as much as digits as its factorization.

11020776721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8232, while the sum is 34.

The spelling of 11020776721 in words is "eleven billion, twenty million, seven hundred seventy-six thousand, seven hundred twenty-one".