1211100561106 has 16 divisors (see below), whose sum is σ = 1879324392600. Its totient is φ = 584659772928.

The previous prime is 1211100561053. The next prime is 1211100561127. The reversal of 1211100561106 is 6011650011121.

It can be written as a sum of positive squares in 4 ways, for example, as 1189209879081 + 21890682025 = 1090509^2 + 147955^2 .

It is a super-2 number, since 2×1211100561106² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4591330 + ... + 4847938.

Almost surely, 2^{1211100561106} is an apocalyptic number.

1211100561106 is a deficient number, since it is larger than the sum of its proper divisors (668223831494).

1211100561106 is a wasteful number, since it uses less digits than its factorization.

1211100561106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338013.

The product of its (nonzero) digits is 360, while the sum is 25.

Adding to 1211100561106 its reverse (6011650011121), we get a palindrome (7222750572227).

The spelling of 1211100561106 in words is "one trillion, two hundred eleven billion, one hundred million, five hundred sixty-one thousand, one hundred six".