11530696721 has 2 divisors, whose sum is σ = 11530696722. Its totient is φ = 11530696720.

The previous prime is 11530696703. The next prime is 11530696739. The reversal of 11530696721 is 12769603511.

It is a balanced prime because it is at equal distance from previous prime (11530696703) and next prime (11530696739).

It can be written as a sum of positive squares in only one way, i.e., 7902321025 + 3628375696 = 88895^2 + 60236^2 .

It is a cyclic number.

It is not a de Polignac number, because 11530696721 - 2³⁰ = 10456954897 is a prime.

It is not a weakly prime, because it can be changed into another prime (11530696741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5765348360 + 5765348361.

It is an arithmetic number, because the mean of its divisors is an integer number (5765348361).

Almost surely, 2^11530696721 is an apocalyptic number.

It is an amenable number.

11530696721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11530696721 is an equidigital number, since it uses as much as digits as its factorization.

11530696721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 11530696721 in words is "eleven billion, five hundred thirty million, six hundred ninety-six thousand, seven hundred twenty-one".