222011220220981 has 2 divisors, whose sum is σ = 222011220220982. Its totient is φ = 222011220220980.

The previous prime is 222011220220967. The next prime is 222011220221003. The reversal of 222011220220981 is 189022022110222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218112550225956 + 3898669995025 = 14768634^2 + 1974505^2 .

It is a cyclic number.

It is not a de Polignac number, because 222011220220981 - 2¹⁵ = 222011220188213 is a prime.

It is a super-2 number, since 2×222011220220981² (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 (222011220220081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111005610110490 + 111005610110491.

It is an arithmetic number, because the mean of its divisors is an integer number (111005610110491).

Almost surely, 2^{222011220220981} is an apocalyptic number.

It is an amenable number.

222011220220981 is a deficient number, since it is larger than the sum of its proper divisors (1).

222011220220981 is an equidigital number, since it uses as much as digits as its factorization.

222011220220981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 222011220220981 in words is "two hundred twenty-two trillion, eleven billion, two hundred twenty million, two hundred twenty thousand, nine hundred eighty-one".