222221021101181 has 2 divisors, whose sum is σ = 222221021101182. Its totient is φ = 222221021101180.

The previous prime is 222221021101127. The next prime is 222221021101201. The reversal of 222221021101181 is 181101120122222.

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., 119542318798681 + 102678702302500 = 10933541^2 + 10133050^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221021101181 - 2²² = 222221016906877 is a prime.

It is a super-2 number, since 2×222221021101181² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222221021101181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222221021101111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110510550590 + 111110510550591.

It is an arithmetic number, because the mean of its divisors is an integer number (111110510550591).

Almost surely, 2^{222221021101181} is an apocalyptic number.

It is an amenable number.

222221021101181 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221021101181 is an equidigital number, since it uses as much as digits as its factorization.

222221021101181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 26.

The spelling of 222221021101181 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, twenty-one million, one hundred one thousand, one hundred eighty-one".