123021211123 has 8 divisors (see below), whose sum is σ = 123274353600. Its totient is φ = 122768138088.

The previous prime is 123021211091. The next prime is 123021211129. The reversal of 123021211123 is 321112120321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123021211123 - 2⁵ = 123021211091 is a prime.

It is a super-2 number, since 2×123021211123² (a number of 23 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 123021211123.

It is not an unprimeable number, because it can be changed into a prime (123021211129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4976568 + ... + 5001226.

It is an arithmetic number, because the mean of its divisors is an integer number (15409294200).

Almost surely, 2^123021211123 is an apocalyptic number.

123021211123 is a deficient number, since it is larger than the sum of its proper divisors (253142477).

123021211123 is an equidigital number, since it uses as much as digits as its factorization.

123021211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34721.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123021211123 its reverse (321112120321), we get a palindrome (444133331444).

The spelling of 123021211123 in words is "one hundred twenty-three billion, twenty-one million, two hundred eleven thousand, one hundred twenty-three".