1222011222001 has 2 divisors, whose sum is σ = 1222011222002. Its totient is φ = 1222011222000.

The previous prime is 1222011221933. The next prime is 1222011222007. The reversal of 1222011222001 is 1002221102221.

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., 964718804401 + 257292417600 = 982201^2 + 507240^2 .

It is an emirp because it is prime and its reverse (1002221102221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222011222001 is a prime.

It is a super-2 number, since 2×1222011222001² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1222011222007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611005611000 + 611005611001.

It is an arithmetic number, because the mean of its divisors is an integer number (611005611001).

Almost surely, 2^{1222011222001} is an apocalyptic number.

It is an amenable number.

1222011222001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222011222001 is an equidigital number, since it uses as much as digits as its factorization.

1222011222001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1222011222001 its reverse (1002221102221), we get a palindrome (2224232324222).

The spelling of 1222011222001 in words is "one trillion, two hundred twenty-two billion, eleven million, two hundred twenty-two thousand, one".