1000020221269 has 2 divisors, whose sum is σ = 1000020221270. Its totient is φ = 1000020221268.

The previous prime is 1000020221197. The next prime is 1000020221359. The reversal of 1000020221269 is 9621220200001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 791856158769 + 208164062500 = 889863^2 + 456250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000020221269 - 2⁹ = 1000020220757 is a prime.

It is a super-2 number, since 2×1000020221269² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000020261269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500010110634 + 500010110635.

It is an arithmetic number, because the mean of its divisors is an integer number (500010110635).

Almost surely, 2^{1000020221269} is an apocalyptic number.

It is an amenable number.

1000020221269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000020221269 is an equidigital number, since it uses as much as digits as its factorization.

1000020221269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 1000020221269 in words is "one trillion, twenty million, two hundred twenty-one thousand, two hundred sixty-nine".