1020111221069 has 2 divisors, whose sum is σ = 1020111221070. Its totient is φ = 1020111221068.

The previous prime is 1020111221039. The next prime is 1020111221167. The reversal of 1020111221069 is 9601221110201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 797716922500 + 222394298569 = 893150^2 + 471587^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020111221069 - 2²⁰ = 1020110172493 is a prime.

It is a super-2 number, since 2×1020111221069² (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 (1020111221039) 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, 510055610534 + 510055610535.

It is an arithmetic number, because the mean of its divisors is an integer number (510055610535).

Almost surely, 2^{1020111221069} is an apocalyptic number.

It is an amenable number.

1020111221069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020111221069 is an equidigital number, since it uses as much as digits as its factorization.

1020111221069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 1020111221069 in words is "one trillion, twenty billion, one hundred eleven million, two hundred twenty-one thousand, sixty-nine".