1096121021 has 2 divisors, whose sum is σ = 1096121022. Its totient is φ = 1096121020.

The previous prime is 1096121009. The next prime is 1096121071. The reversal of 1096121021 is 1201216901.

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., 818532100 + 277588921 = 28610^2 + 16661^2 .

It is an emirp because it is prime and its reverse (1201216901) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1096121021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1096121071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548060510 + 548060511.

It is an arithmetic number, because the mean of its divisors is an integer number (548060511).

Almost surely, 2^1096121021 is an apocalyptic number.

It is an amenable number.

1096121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1096121021 is an equidigital number, since it uses as much as digits as its factorization.

1096121021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1096121021 is about 33107.7184505366. The cubic root of 1096121021 is about 1031.0652945916.

Adding to 1096121021 its reverse (1201216901), we get a palindrome (2297337922).

The spelling of 1096121021 in words is "one billion, ninety-six million, one hundred twenty-one thousand, twenty-one".