1022221181 has 2 divisors, whose sum is σ = 1022221182. Its totient is φ = 1022221180.

The previous prime is 1022221153. The next prime is 1022221217. The reversal of 1022221181 is 1811222201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1009015225 + 13205956 = 31765^2 + 3634^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022221181 - 2¹⁴ = 1022204797 is a prime.

It is a super-2 number, since 2×1022221181² = 2089872285770069522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022221121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511110590 + 511110591.

It is an arithmetic number, because the mean of its divisors is an integer number (511110591).

Almost surely, 2^1022221181 is an apocalyptic number.

It is an amenable number.

1022221181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022221181 is an equidigital number, since it uses as much as digits as its factorization.

1022221181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 1022221181 is about 31972.1938721759. The cubic root of 1022221181 is about 1007.3528632259.

Adding to 1022221181 its reverse (1811222201), we get a palindrome (2833443382).

The spelling of 1022221181 in words is "one billion, twenty-two million, two hundred twenty-one thousand, one hundred eighty-one".