1211100116135 has 64 divisors (see below), whose sum is σ = 1797179166720. Its totient is φ = 762959208960.

The previous prime is 1211100116059. The next prime is 1211100116137. The reversal of 1211100116135 is 5316110011121.

It is not a de Polignac number, because 1211100116135 - 2¹⁰ = 1211100115111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211100116135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211100116137) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 134997200 + ... + 135006170.

It is an arithmetic number, because the mean of its divisors is an integer number (28080924480).

Almost surely, 2^{1211100116135} is an apocalyptic number.

1211100116135 is a deficient number, since it is larger than the sum of its proper divisors (586079050585).

1211100116135 is a wasteful number, since it uses less digits than its factorization.

1211100116135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10368.

The product of its (nonzero) digits is 180, while the sum is 23.

Adding to 1211100116135 its reverse (5316110011121), we get a palindrome (6527210127256).

The spelling of 1211100116135 in words is "one trillion, two hundred eleven billion, one hundred million, one hundred sixteen thousand, one hundred thirty-five".