222118025981 has 2 divisors, whose sum is σ = 222118025982. Its totient is φ = 222118025980.

The previous prime is 222118025953. The next prime is 222118026007. The reversal of 222118025981 is 189520811222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132557887225 + 89560138756 = 364085^2 + 299266^2 .

It is a cyclic number.

It is not a de Polignac number, because 222118025981 - 2²² = 222113831677 is a prime.

It is a super-2 number, since 2×222118025981² (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 (222118028981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111059012990 + 111059012991.

It is an arithmetic number, because the mean of its divisors is an integer number (111059012991).

Almost surely, 2^222118025981 is an apocalyptic number.

It is an amenable number.

222118025981 is a deficient number, since it is larger than the sum of its proper divisors (1).

222118025981 is an equidigital number, since it uses as much as digits as its factorization.

222118025981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 41.

The spelling of 222118025981 in words is "two hundred twenty-two billion, one hundred eighteen million, twenty-five thousand, nine hundred eighty-one".