1011020200109 has 8 divisors (see below), whose sum is σ = 1107405493560. Its totient is φ = 918736408576.

The previous prime is 1011020200097. The next prime is 1011020200123. The reversal of 1011020200109 is 9010020201101.

It can be written as a sum of positive squares in 4 ways, for example, as 472965675625 + 538054524484 = 687725^2 + 733522^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011020200109 - 2³² = 1006725232813 is a prime.

It is a super-2 number, since 2×1011020200109² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011020200129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025374964 + ... + 1025375949.

It is an arithmetic number, because the mean of its divisors is an integer number (138425686695).

Almost surely, 2^{1011020200109} is an apocalyptic number.

It is an amenable number.

1011020200109 is a deficient number, since it is larger than the sum of its proper divisors (96385293451).

1011020200109 is a wasteful number, since it uses less digits than its factorization.

1011020200109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050750959.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 1011020200109 in words is "one trillion, eleven billion, twenty million, two hundred thousand, one hundred nine".