222773042577821 has 2 divisors, whose sum is σ = 222773042577822. Its totient is φ = 222773042577820.

The previous prime is 222773042577713. The next prime is 222773042577881. The reversal of 222773042577821 is 128775240377222.

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., 182476573375321 + 40296469202500 = 13508389^2 + 6347950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222773042577821 is a prime.

It is a super-2 number, since 2×222773042577821² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222773042577881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111386521288910 + 111386521288911.

It is an arithmetic number, because the mean of its divisors is an integer number (111386521288911).

Almost surely, 2^{222773042577821} is an apocalyptic number.

It is an amenable number.

222773042577821 is a deficient number, since it is larger than the sum of its proper divisors (1).

222773042577821 is an equidigital number, since it uses as much as digits as its factorization.

222773042577821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36879360, while the sum is 59.

The spelling of 222773042577821 in words is "two hundred twenty-two trillion, seven hundred seventy-three billion, forty-two million, five hundred seventy-seven thousand, eight hundred twenty-one".