221220222049 has 2 divisors, whose sum is σ = 221220222050. Its totient is φ = 221220222048.

The previous prime is 221220221987. The next prime is 221220222089. The reversal of 221220222049 is 940222022122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131464256400 + 89755965649 = 362580^2 + 299593^2 .

It is a cyclic number.

It is not a de Polignac number, because 221220222049 - 2²³ = 221211833441 is a prime.

It is not a weakly prime, because it can be changed into another prime (221220222089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610111024 + 110610111025.

It is an arithmetic number, because the mean of its divisors is an integer number (110610111025).

Almost surely, 2^221220222049 is an apocalyptic number.

It is an amenable number.

221220222049 is a deficient number, since it is larger than the sum of its proper divisors (1).

221220222049 is an equidigital number, since it uses as much as digits as its factorization.

221220222049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 221220222049 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, forty-nine".