1022212222181 has 2 divisors, whose sum is σ = 1022212222182. Its totient is φ = 1022212222180.

The previous prime is 1022212222133. The next prime is 1022212222211. The reversal of 1022212222181 is 1812222122201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841934704900 + 180277517281 = 917570^2 + 424591^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022212222181 - 2⁶ = 1022212222117 is a prime.

It is a super-2 number, since 2×1022212222181² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1022212222181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022212222781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511106111090 + 511106111091.

It is an arithmetic number, because the mean of its divisors is an integer number (511106111091).

Almost surely, 2^{1022212222181} is an apocalyptic number.

It is an amenable number.

1022212222181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022212222181 is an equidigital number, since it uses as much as digits as its factorization.

1022212222181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 26.

Adding to 1022212222181 its reverse (1812222122201), we get a palindrome (2834434344382).

The spelling of 1022212222181 in words is "one trillion, twenty-two billion, two hundred twelve million, two hundred twenty-two thousand, one hundred eighty-one".