1222021011217 has 2 divisors, whose sum is σ = 1222021011218. Its totient is φ = 1222021011216.

The previous prime is 1222021011203. The next prime is 1222021011223. The reversal of 1222021011217 is 7121101202221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1158398011521 + 63622999696 = 1076289^2 + 252236^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222021011217 - 2²³ = 1222012622609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222021011227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611010505608 + 611010505609.

It is an arithmetic number, because the mean of its divisors is an integer number (611010505609).

Almost surely, 2^{1222021011217} is an apocalyptic number.

It is an amenable number.

1222021011217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222021011217 is an equidigital number, since it uses as much as digits as its factorization.

1222021011217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 1222021011217 its reverse (7121101202221), we get a palindrome (8343122213438).

The spelling of 1222021011217 in words is "one trillion, two hundred twenty-two billion, twenty-one million, eleven thousand, two hundred seventeen".