11123132203121 has 4 divisors (see below), whose sum is σ = 11140759988544. Its totient is φ = 11105504417700.

The previous prime is 11123132203111. The next prime is 11123132203159. The reversal of 11123132203121 is 12130223132111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11123132203121 - 2¹⁴ = 11123132186737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11123132203111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8813891765 + ... + 8813893026.

It is an arithmetic number, because the mean of its divisors is an integer number (2785189997136).

Almost surely, 2^{11123132203121} is an apocalyptic number.

It is an amenable number.

11123132203121 is a deficient number, since it is larger than the sum of its proper divisors (17627785423).

11123132203121 is an equidigital number, since it uses as much as digits as its factorization.

11123132203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17627785422.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 11123132203121 its reverse (12130223132111), we get a palindrome (23253355335232).

The spelling of 11123132203121 in words is "eleven trillion, one hundred twenty-three billion, one hundred thirty-two million, two hundred three thousand, one hundred twenty-one".