123011011123 has 32 divisors (see below), whose sum is σ = 170489475072. Its totient is φ = 85625251200.

The previous prime is 123011011121. The next prime is 123011011217. The reversal of 123011011123 is 321110110321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123011011123 - 2¹ = 123011011121 is a prime.

It is a super-2 number, since 2×123011011123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123011011097 and 123011011106.

It is not an unprimeable number, because it can be changed into a prime (123011011121) 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, 1951036 + ... + 2013097.

It is an arithmetic number, because the mean of its divisors is an integer number (5327796096).

Almost surely, 2^123011011123 is an apocalyptic number.

123011011123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123011011123 is a deficient number, since it is larger than the sum of its proper divisors (47478463949).

123011011123 is a wasteful number, since it uses less digits than its factorization.

123011011123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964195.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 123011011123 its reverse (321110110321), we get a palindrome (444121121444).

The spelling of 123011011123 in words is "one hundred twenty-three billion, eleven million, eleven thousand, one hundred twenty-three".