1221200001106 has 16 divisors (see below), whose sum is σ = 1912624228800. Its totient is φ = 583691390128.

The previous prime is 1221200001097. The next prime is 1221200001127. The reversal of 1221200001106 is 6011000021221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221200001106.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8124361 + ... + 8273308.

It is an arithmetic number, because the mean of its divisors is an integer number (119539014300).

Almost surely, 2^{1221200001106} is an apocalyptic number.

1221200001106 is a deficient number, since it is larger than the sum of its proper divisors (691424227694).

1221200001106 is a wasteful number, since it uses less digits than its factorization.

1221200001106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16399313.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1221200001106 its reverse (6011000021221), we get a palindrome (7232200022327).

The spelling of 1221200001106 in words is "one trillion, two hundred twenty-one billion, two hundred million, one thousand, one hundred six".