123430542121 has 8 divisors (see below), whose sum is σ = 127443585024. Its totient is φ = 119419462560.

The previous prime is 123430542119. The next prime is 123430542127. The reversal of 123430542121 is 121245034321.

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 123430542121 - 2¹ = 123430542119 is a prime.

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 123430542121.

It is not an unprimeable number, because it can be changed into a prime (123430542127) 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, 362521 + ... + 615046.

It is an arithmetic number, because the mean of its divisors is an integer number (15930448128).

Almost surely, 2^123430542121 is an apocalyptic number.

It is an amenable number.

123430542121 is a deficient number, since it is larger than the sum of its proper divisors (4013042903).

123430542121 is an equidigital number, since it uses as much as digits as its factorization.

123430542121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981671.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 123430542121 its reverse (121245034321), we get a palindrome (244675576442).

The spelling of 123430542121 in words is "one hundred twenty-three billion, four hundred thirty million, five hundred forty-two thousand, one hundred twenty-one".