222210496721 has 2 divisors, whose sum is σ = 222210496722. Its totient is φ = 222210496720.

The previous prime is 222210496699. The next prime is 222210496741. The reversal of 222210496721 is 127694012222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161873452225 + 60337044496 = 402335^2 + 245636^2 .

It is a cyclic number.

It is not a de Polignac number, because 222210496721 - 2¹⁰ = 222210495697 is a prime.

It is not a weakly prime, because it can be changed into another prime (222210496741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111105248360 + 111105248361.

It is an arithmetic number, because the mean of its divisors is an integer number (111105248361).

Almost surely, 2^222210496721 is an apocalyptic number.

It is an amenable number.

222210496721 is a deficient number, since it is larger than the sum of its proper divisors (1).

222210496721 is an equidigital number, since it uses as much as digits as its factorization.

222210496721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 222210496721 in words is "two hundred twenty-two billion, two hundred ten million, four hundred ninety-six thousand, seven hundred twenty-one".