1121321030021 has 2 divisors, whose sum is σ = 1121321030022. Its totient is φ = 1121321030020.

The previous prime is 1121321030017. The next prime is 1121321030029. The reversal of 1121321030021 is 1200301231211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1118158204900 + 3162825121 = 1057430^2 + 56239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121321030021 - 2² = 1121321030017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121321030029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560660515010 + 560660515011.

It is an arithmetic number, because the mean of its divisors is an integer number (560660515011).

Almost surely, 2^{1121321030021} is an apocalyptic number.

It is an amenable number.

1121321030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121321030021 is an equidigital number, since it uses as much as digits as its factorization.

1121321030021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1121321030021 its reverse (1200301231211), we get a palindrome (2321622261232).

The spelling of 1121321030021 in words is "one trillion, one hundred twenty-one billion, three hundred twenty-one million, thirty thousand, twenty-one".