12211121021123 has 4 divisors (see below), whose sum is σ = 12214362628560. Its totient is φ = 12207879413688.

The previous prime is 12211121021119. The next prime is 12211121021147. The reversal of 12211121021123 is 32112012111221.

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 12211121021123 - 2² = 12211121021119 is a prime.

It is a super-2 number, since 2×12211121021123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211121021095 and 12211121021104.

It is not an unprimeable number, because it can be changed into a prime (12211121021023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620798068 + ... + 1620805601.

It is an arithmetic number, because the mean of its divisors is an integer number (3053590657140).

Almost surely, 2^{12211121021123} is an apocalyptic number.

12211121021123 is a deficient number, since it is larger than the sum of its proper divisors (3241607437).

12211121021123 is an equidigital number, since it uses as much as digits as its factorization.

12211121021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241607436.

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

Adding to 12211121021123 its reverse (32112012111221), we get a palindrome (44323133132344).

The spelling of 12211121021123 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty-three".