222886161821 has 2 divisors, whose sum is σ = 222886161822. Its totient is φ = 222886161820.

The previous prime is 222886161791. The next prime is 222886161881. The reversal of 222886161821 is 128161688222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199657048900 + 23229112921 = 446830^2 + 152411^2 .

It is a cyclic number.

It is not a de Polignac number, because 222886161821 - 2²⁶ = 222819052957 is a prime.

It is a super-2 number, since 2×222886161821² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222886161881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111443080910 + 111443080911.

It is an arithmetic number, because the mean of its divisors is an integer number (111443080911).

Almost surely, 2^222886161821 is an apocalyptic number.

It is an amenable number.

222886161821 is a deficient number, since it is larger than the sum of its proper divisors (1).

222886161821 is an equidigital number, since it uses as much as digits as its factorization.

222886161821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294912, while the sum is 47.

The spelling of 222886161821 in words is "two hundred twenty-two billion, eight hundred eighty-six million, one hundred sixty-one thousand, eight hundred twenty-one".