11013121210123 has 4 divisors (see below), whose sum is σ = 11660951869560. Its totient is φ = 10365290550688.

The previous prime is 11013121210099. The next prime is 11013121210129. The reversal of 11013121210123 is 32101212131011.

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

It is a cyclic number.

It is not a de Polignac number, because 11013121210123 - 2³⁷ = 10875682256651 is a prime.

It is a super-2 number, since 2×11013121210123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11013121210123.

It is not an unprimeable number, because it can be changed into a prime (11013121210129) 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, 323915329693 + ... + 323915329726.

It is an arithmetic number, because the mean of its divisors is an integer number (2915237967390).

Almost surely, 2^{11013121210123} is an apocalyptic number.

11013121210123 is a deficient number, since it is larger than the sum of its proper divisors (647830659437).

11013121210123 is an equidigital number, since it uses as much as digits as its factorization.

11013121210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647830659436.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11013121210123 its reverse (32101212131011), we get a palindrome (43114333341134).

The spelling of 11013121210123 in words is "eleven trillion, thirteen billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty-three".