1121234310221 has 2 divisors, whose sum is σ = 1121234310222. Its totient is φ = 1121234310220.

The previous prime is 1121234310199. The next prime is 1121234310247. The reversal of 1121234310221 is 1220134321211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 984788293225 + 136446016996 = 992365^2 + 369386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121234310221 - 2³⁴ = 1104054441037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121234310271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560617155110 + 560617155111.

It is an arithmetic number, because the mean of its divisors is an integer number (560617155111).

Almost surely, 2^{1121234310221} is an apocalyptic number.

It is an amenable number.

1121234310221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121234310221 is an equidigital number, since it uses as much as digits as its factorization.

1121234310221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1121234310221 its reverse (1220134321211), we get a palindrome (2341368631432).

The spelling of 1121234310221 in words is "one trillion, one hundred twenty-one billion, two hundred thirty-four million, three hundred ten thousand, two hundred twenty-one".