11211210133 has 16 divisors (see below), whose sum is σ = 12055212720. Its totient is φ = 10388238336.

The previous prime is 11211210097. The next prime is 11211210139. The reversal of 11211210133 is 33101211211.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1563648849 + 9647561284 = 39543^2 + 98222^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211210133 - 2²⁵ = 11177655701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211210139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 698191 + ... + 714067.

It is an arithmetic number, because the mean of its divisors is an integer number (753450795).

Almost surely, 2^11211210133 is an apocalyptic number.

It is an amenable number.

11211210133 is a deficient number, since it is larger than the sum of its proper divisors (844002587).

11211210133 is a wasteful number, since it uses less digits than its factorization.

11211210133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16536.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11211210133 its reverse (33101211211), we get a palindrome (44312421344).

The spelling of 11211210133 in words is "eleven billion, two hundred eleven million, two hundred ten thousand, one hundred thirty-three".