12100020200109 has 6 divisors (see below), whose sum is σ = 17477806955726. Its totient is φ = 8066680133400.

The previous prime is 12100020200087. The next prime is 12100020200111. The reversal of 12100020200109 is 90100202000121.

It can be written as a sum of positive squares in only one way, i.e., 11775123620100 + 324896580009 = 3431490^2 + 569997^2 .

It is not a de Polignac number, because 12100020200109 - 2¹² = 12100020196013 is a prime.

It is a super-2 number, since 2×12100020200109² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12100020200091 and 12100020200100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100020200179) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672223344442 + ... + 672223344459.

Almost surely, 2^{12100020200109} is an apocalyptic number.

It is an amenable number.

12100020200109 is a deficient number, since it is larger than the sum of its proper divisors (5377786755617).

12100020200109 is a wasteful number, since it uses less digits than its factorization.

12100020200109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344446688907 (or 1344446688904 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 12100020200109 in words is "twelve trillion, one hundred billion, twenty million, two hundred thousand, one hundred nine".