123130213121 has 32 divisors (see below), whose sum is σ = 138443095296. Its totient is φ = 108908800000.

The previous prime is 123130213111. The next prime is 123130213133. The reversal of 123130213121 is 121312031321.

It is a happy number.

It is not a de Polignac number, because 123130213121 - 2²⁶ = 123063104257 is a prime.

It is a super-2 number, since 2×123130213121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123130213093 and 123130213102.

It is not an unprimeable number, because it can be changed into a prime (123130213111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5161421 + ... + 5185221.

It is an arithmetic number, because the mean of its divisors is an integer number (4326346728).

Almost surely, 2^123130213121 is an apocalyptic number.

It is an amenable number.

123130213121 is a deficient number, since it is larger than the sum of its proper divisors (15312882175).

123130213121 is a wasteful number, since it uses less digits than its factorization.

123130213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24073.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123130213121 its reverse (121312031321), we get a palindrome (244442244442).

The spelling of 123130213121 in words is "one hundred twenty-three billion, one hundred thirty million, two hundred thirteen thousand, one hundred twenty-one".