123031121121 has 24 divisors (see below), whose sum is σ = 178747508160. Its totient is φ = 81542868000.

The previous prime is 123031121113. The next prime is 123031121123. The reversal of 123031121121 is 121121130321.

123031121121 is a `hidden beast` number, since 1 + 230 + 311 + 2 + 1 + 121 = 666.

It is not a de Polignac number, because 123031121121 - 2³ = 123031121113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123031121094 and 123031121103.

It is not an unprimeable number, because it can be changed into a prime (123031121123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10160971 + ... + 10173071.

It is an arithmetic number, because the mean of its divisors is an integer number (7447812840).

Almost surely, 2^123031121121 is an apocalyptic number.

It is an amenable number.

123031121121 is a deficient number, since it is larger than the sum of its proper divisors (55716387039).

123031121121 is a wasteful number, since it uses less digits than its factorization.

123031121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18597 (or 18594 counting only the distinct ones).

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

Adding to 123031121121 its reverse (121121130321), we get a palindrome (244152251442).

The spelling of 123031121121 in words is "one hundred twenty-three billion, thirty-one million, one hundred twenty-one thousand, one hundred twenty-one".