11111322123 has 32 divisors (see below), whose sum is σ = 18339793920. Its totient is φ = 6590846880.

The previous prime is 11111322109. The next prime is 11111322139. The reversal of 11111322123 is 32122311111.

It is not a de Polignac number, because 11111322123 - 2⁴ = 11111322107 is a prime.

It is a super-2 number, since 2×11111322123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11111322096 and 11111322105.

It is not an unprimeable number, because it can be changed into a prime (11111322023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 384040 + ... + 411957.

It is an arithmetic number, because the mean of its divisors is an integer number (573118560).

Almost surely, 2^11111322123 is an apocalyptic number.

11111322123 is a deficient number, since it is larger than the sum of its proper divisors (7228471797).

11111322123 is a wasteful number, since it uses less digits than its factorization.

11111322123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796064 (or 796058 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11111322123 its reverse (32122311111), we get a palindrome (43233633234).

The spelling of 11111322123 in words is "eleven billion, one hundred eleven million, three hundred twenty-two thousand, one hundred twenty-three".