11727282821 has 2 divisors, whose sum is σ = 11727282822. Its totient is φ = 11727282820.

The previous prime is 11727282817. The next prime is 11727282899. The reversal of 11727282821 is 12828272711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8788125025 + 2939157796 = 93745^2 + 54214^2 .

It is a cyclic number.

It is not a de Polignac number, because 11727282821 - 2² = 11727282817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11727222821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5863641410 + 5863641411.

It is an arithmetic number, because the mean of its divisors is an integer number (5863641411).

Almost surely, 2^11727282821 is an apocalyptic number.

It is an amenable number.

11727282821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11727282821 is an equidigital number, since it uses as much as digits as its factorization.

11727282821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50176, while the sum is 41.

The spelling of 11727282821 in words is "eleven billion, seven hundred twenty-seven million, two hundred eighty-two thousand, eight hundred twenty-one".