11231211211 has 16 divisors (see below), whose sum is σ = 13101416928. Its totient is φ = 9514432000.

The previous prime is 11231211209. The next prime is 11231211217. The reversal of 11231211211 is 11211213211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11231211211 - 2¹ = 11231211209 is a prime.

It is a super-2 number, since 2×11231211211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11231211217) 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, 278440 + ... + 316213.

It is an arithmetic number, because the mean of its divisors is an integer number (818838558).

Almost surely, 2^11231211211 is an apocalyptic number.

11231211211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11231211211 is a deficient number, since it is larger than the sum of its proper divisors (1870205717).

11231211211 is a wasteful number, since it uses less digits than its factorization.

11231211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594782.

The product of its digits is 24, while the sum is 16.

Adding to 11231211211 its reverse (11211213211), we get a palindrome (22442424422).

The spelling of 11231211211 in words is "eleven billion, two hundred thirty-one million, two hundred eleven thousand, two hundred eleven".