1200100101 has 8 divisors (see below), whose sum is σ = 1604667840. Its totient is φ = 797799552.

The previous prime is 1200100081. The next prime is 1200100129. The reversal of 1200100101 is 1010010021.

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

It is not a de Polignac number, because 1200100101 - 2¹³ = 1200091909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200100151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565561 + ... + 567678.

It is an arithmetic number, because the mean of its divisors is an integer number (200583480).

Almost surely, 2^1200100101 is an apocalyptic number.

It is an amenable number.

1200100101 is a deficient number, since it is larger than the sum of its proper divisors (404567739).

1200100101 is a wasteful number, since it uses less digits than its factorization.

1200100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133595.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1200100101 is about 34642.4609547301. The cubic root of 1200100101 is about 1062.6881164681.

Adding to 1200100101 its reverse (1010010021), we get a palindrome (2210110122).

The spelling of 1200100101 in words is "one billion, two hundred million, one hundred thousand, one hundred one".