11273296721 has 2 divisors, whose sum is σ = 11273296722. Its totient is φ = 11273296720.

The previous prime is 11273296711. The next prime is 11273296729. The reversal of 11273296721 is 12769237211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10663453696 + 609843025 = 103264^2 + 24695^2 .

It is a cyclic number.

It is not a de Polignac number, because 11273296721 - 2²² = 11269102417 is a prime.

It is not a weakly prime, because it can be changed into another prime (11273296729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5636648360 + 5636648361.

It is an arithmetic number, because the mean of its divisors is an integer number (5636648361).

Almost surely, 2^11273296721 is an apocalyptic number.

It is an amenable number.

11273296721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11273296721 is an equidigital number, since it uses as much as digits as its factorization.

11273296721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The spelling of 11273296721 in words is "eleven billion, two hundred seventy-three million, two hundred ninety-six thousand, seven hundred twenty-one".