11203123211 has 8 divisors (see below), whose sum is σ = 12804288000. Its totient is φ = 9602138088.

The previous prime is 11203123189. The next prime is 11203123231. The reversal of 11203123211 is 11232130211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11203123211 - 2⁶ = 11203123147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11203123211.

It is not an unprimeable number, because it can be changed into a prime (11203123231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138830 + ... + 204156.

It is an arithmetic number, because the mean of its divisors is an integer number (1600536000).

Almost surely, 2^11203123211 is an apocalyptic number.

11203123211 is a deficient number, since it is larger than the sum of its proper divisors (1601164789).

11203123211 is an equidigital number, since it uses as much as digits as its factorization.

11203123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89833.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11203123211 its reverse (11232130211), we get a palindrome (22435253422).

The spelling of 11203123211 in words is "eleven billion, two hundred three million, one hundred twenty-three thousand, two hundred eleven".