1200212101 has 8 divisors (see below), whose sum is σ = 1309626144. Its totient is φ = 1090848720.

The previous prime is 1200212093. The next prime is 1200212119. The reversal of 1200212101 is 1012120021.

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 1200212101 - 2³ = 1200212093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200212141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50671 + ... + 70483.

It is an arithmetic number, because the mean of its divisors is an integer number (163703268).

Almost surely, 2^1200212101 is an apocalyptic number.

1200212101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200212101 is a deficient number, since it is larger than the sum of its proper divisors (109414043).

1200212101 is a wasteful number, since it uses less digits than its factorization.

1200212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25331.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1200212101 is about 34644.0774303488. The cubic root of 1200212101 is about 1062.7211740902.

Adding to 1200212101 its reverse (1012120021), we get a palindrome (2212332122).

The spelling of 1200212101 in words is "one billion, two hundred million, two hundred twelve thousand, one hundred one".