1642221513227 has 2 divisors, whose sum is σ = 1642221513228. Its totient is φ = 1642221513226.

The previous prime is 1642221513203. The next prime is 1642221513277. The reversal of 1642221513227 is 7223151222461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1642221513227 - 2³⁴ = 1625041644043 is a prime.

It is not a weakly prime, because it can be changed into another prime (1642221513277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821110756613 + 821110756614.

It is an arithmetic number, because the mean of its divisors is an integer number (821110756614).

Almost surely, 2^{1642221513227} is an apocalyptic number.

1642221513227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642221513227 is an equidigital number, since it uses as much as digits as its factorization.

1642221513227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

Adding to 1642221513227 its reverse (7223151222461), we get a palindrome (8865372735688).

The spelling of 1642221513227 in words is "one trillion, six hundred forty-two billion, two hundred twenty-one million, five hundred thirteen thousand, two hundred twenty-seven".