11123012221121 has 4 divisors (see below), whose sum is σ = 11169165799044. Its totient is φ = 11076858643200.

The previous prime is 11123012221109. The next prime is 11123012221199. The reversal of 11123012221121 is 12112221032111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8809403908096 + 2313608313025 = 2968064^2 + 1521055^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123012221121 - 2²² = 11123008026817 is a prime.

It is a super-4 number, since 4×11123012221121⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11123012221093 and 11123012221102.

It is not an unprimeable number, because it can be changed into a prime (11123012221421) 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, 23076788600 + ... + 23076789081.

It is an arithmetic number, because the mean of its divisors is an integer number (2792291449761).

Almost surely, 2^{11123012221121} is an apocalyptic number.

It is an amenable number.

11123012221121 is a deficient number, since it is larger than the sum of its proper divisors (46153577923).

11123012221121 is an equidigital number, since it uses as much as digits as its factorization.

11123012221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46153577922.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 11123012221121 its reverse (12112221032111), we get a palindrome (23235233253232).

The spelling of 11123012221121 in words is "eleven trillion, one hundred twenty-three billion, twelve million, two hundred twenty-one thousand, one hundred twenty-one".