1221321030049 has 2 divisors, whose sum is σ = 1221321030050. Its totient is φ = 1221321030048.

The previous prime is 1221321029987. The next prime is 1221321030053. The reversal of 1221321030049 is 9400301231221.

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., 1049278581649 + 172042448400 = 1024343^2 + 414780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221321030049 - 2¹⁷ = 1221320898977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221321029999 and 1221321030026.

It is not a weakly prime, because it can be changed into another prime (1221321030089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610660515024 + 610660515025.

It is an arithmetic number, because the mean of its divisors is an integer number (610660515025).

Almost surely, 2^{1221321030049} is an apocalyptic number.

It is an amenable number.

1221321030049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221321030049 is an equidigital number, since it uses as much as digits as its factorization.

1221321030049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 1221321030049 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-one million, thirty thousand, forty-nine".