11121213122123 has 16 divisors (see below), whose sum is σ = 11982991226976. Its totient is φ = 10260336552960.

The previous prime is 11121213122081. The next prime is 11121213122171. The reversal of 11121213122123 is 32122131212111.

It is a de Polignac number, because none of the positive numbers 2^k-11121213122123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121213152123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201908315 + ... + 201963387.

It is an arithmetic number, because the mean of its divisors is an integer number (748936951686).

Almost surely, 2^{11121213122123} is an apocalyptic number.

11121213122123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11121213122123 is a deficient number, since it is larger than the sum of its proper divisors (861778104853).

11121213122123 is a wasteful number, since it uses less digits than its factorization.

11121213122123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62974.

The product of its digits is 288, while the sum is 23.

Adding to 11121213122123 its reverse (32122131212111), we get a palindrome (43243344334234).

The spelling of 11121213122123 in words is "eleven trillion, one hundred twenty-one billion, two hundred thirteen million, one hundred twenty-two thousand, one hundred twenty-three".