1200100002101 has 32 divisors (see below), whose sum is σ = 1634017867776. Its totient is φ = 851050872000.

The previous prime is 1200100002077. The next prime is 1200100002163. The reversal of 1200100002101 is 1012000010021.

It is a de Polignac number, because none of the positive numbers 2^k-1200100002101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200100002001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8371895 + ... + 8514036.

It is an arithmetic number, because the mean of its divisors is an integer number (51063058368).

Almost surely, 2^{1200100002101} is an apocalyptic number.

1200100002101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200100002101 is a deficient number, since it is larger than the sum of its proper divisors (433917865675).

1200100002101 is a wasteful number, since it uses less digits than its factorization.

1200100002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16886033.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1200100002101 its reverse (1012000010021), we get a palindrome (2212100012122).

The spelling of 1200100002101 in words is "one trillion, two hundred billion, one hundred million, two thousand, one hundred one".