1221022221049 has 2 divisors, whose sum is σ = 1221022221050. Its totient is φ = 1221022221048.

The previous prime is 1221022220983. The next prime is 1221022221059. The reversal of 1221022221049 is 9401222201221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1074415171600 + 146607049449 = 1036540^2 + 382893^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221022221049 - 2¹⁹ = 1221021696761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221022221059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610511110524 + 610511110525.

It is an arithmetic number, because the mean of its divisors is an integer number (610511110525).

Almost surely, 2^{1221022221049} is an apocalyptic number.

It is an amenable number.

1221022221049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221022221049 is an equidigital number, since it uses as much as digits as its factorization.

1221022221049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 1221022221049 in words is "one trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, forty-nine".