1220221022249 has 2 divisors, whose sum is σ = 1220221022250. Its totient is φ = 1220221022248.

The previous prime is 1220221022243. The next prime is 1220221022261. The reversal of 1220221022249 is 9422201220221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616036614400 + 604184407849 = 784880^2 + 777293^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220221022249 - 2¹² = 1220221018153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1220221022243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610110511124 + 610110511125.

It is an arithmetic number, because the mean of its divisors is an integer number (610110511125).

Almost surely, 2^{1220221022249} is an apocalyptic number.

It is an amenable number.

1220221022249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220221022249 is an equidigital number, since it uses as much as digits as its factorization.

1220221022249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 1220221022249 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, twenty-two thousand, two hundred forty-nine".