1001200008869 has 2 divisors, whose sum is σ = 1001200008870. Its totient is φ = 1001200008868.

The previous prime is 1001200008857. The next prime is 1001200008883. The reversal of 1001200008869 is 9688000021001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 956356864225 + 44843144644 = 977935^2 + 211762^2 .

It is an emirp because it is prime and its reverse (9688000021001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001200008869 is a prime.

It is a super-2 number, since 2×1001200008869² (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 (1001200008469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500600004434 + 500600004435.

It is an arithmetic number, because the mean of its divisors is an integer number (500600004435).

Almost surely, 2^{1001200008869} is an apocalyptic number.

It is an amenable number.

1001200008869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001200008869 is an equidigital number, since it uses as much as digits as its factorization.

1001200008869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 1001200008869 in words is "one trillion, one billion, two hundred million, eight thousand, eight hundred sixty-nine".