1200100221201 has 24 divisors (see below), whose sum is σ = 1942309502784. Its totient is φ = 655955398560.

The previous prime is 1200100221179. The next prime is 1200100221211. The reversal of 1200100221201 is 1021220010021.

It is not a de Polignac number, because 1200100221201 - 2²³ = 1200091832593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1200100221211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177473730 + ... + 177480491.

It is an arithmetic number, because the mean of its divisors is an integer number (80929562616).

Almost surely, 2^{1200100221201} is an apocalyptic number.

It is an amenable number.

1200100221201 is a deficient number, since it is larger than the sum of its proper divisors (742209281583).

1200100221201 is a wasteful number, since it uses less digits than its factorization.

1200100221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354954261 (or 354954254 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200100221201 its reverse (1021220010021), we get a palindrome (2221320231222).

The spelling of 1200100221201 in words is "one trillion, two hundred billion, one hundred million, two hundred twenty-one thousand, two hundred one".