11202123121 has 4 divisors (see below), whose sum is σ = 12802426432. Its totient is φ = 9601819812.

The previous prime is 11202123083. The next prime is 11202123181. The reversal of 11202123121 is 12132120211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12132120211 = 41 ⋅295905371.

It is a cyclic number.

It is not a de Polignac number, because 11202123121 - 2⁹ = 11202122609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11202123095 and 11202123104.

It is not an unprimeable number, because it can be changed into a prime (11202123181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800151645 + ... + 800151658.

It is an arithmetic number, because the mean of its divisors is an integer number (3200606608).

Almost surely, 2^11202123121 is an apocalyptic number.

It is an amenable number.

11202123121 is a deficient number, since it is larger than the sum of its proper divisors (1600303311).

11202123121 is an equidigital number, since it uses as much as digits as its factorization.

11202123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600303310.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11202123121 its reverse (12132120211), we get a palindrome (23334243332).

The spelling of 11202123121 in words is "eleven billion, two hundred two million, one hundred twenty-three thousand, one hundred twenty-one".