1021221113069 has 2 divisors, whose sum is σ = 1021221113070. Its totient is φ = 1021221113068.

The previous prime is 1021221113053. The next prime is 1021221113071. The reversal of 1021221113069 is 9603111221201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 953478037444 + 67743075625 = 976462^2 + 260275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021221113069 - 2⁴ = 1021221113053 is a prime.

It is a super-2 number, since 2×1021221113069² (a number of 25 digits) contains 22 as substring.

Together with 1021221113071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021221113039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510610556534 + 510610556535.

It is an arithmetic number, because the mean of its divisors is an integer number (510610556535).

Almost surely, 2^{1021221113069} is an apocalyptic number.

It is an amenable number.

1021221113069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021221113069 is an equidigital number, since it uses as much as digits as its factorization.

1021221113069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 1021221113069 in words is "one trillion, twenty-one billion, two hundred twenty-one million, one hundred thirteen thousand, sixty-nine".