123503304121 has 4 divisors (see below), whose sum is σ = 123505905744. Its totient is φ = 123500702500.

The previous prime is 123503304103. The next prime is 123503304137. The reversal of 123503304121 is 121403305321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123503304121 - 2⁷ = 123503303993 is a prime.

It is a super-2 number, since 2×123503304121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123503302121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1228255 + ... + 1324996.

It is an arithmetic number, because the mean of its divisors is an integer number (30876476436).

Almost surely, 2^123503304121 is an apocalyptic number.

It is an amenable number.

123503304121 is a deficient number, since it is larger than the sum of its proper divisors (2601623).

123503304121 is an equidigital number, since it uses as much as digits as its factorization.

123503304121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2601622.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 123503304121 its reverse (121403305321), we get a palindrome (244906609442).

The spelling of 123503304121 in words is "one hundred twenty-three billion, five hundred three million, three hundred four thousand, one hundred twenty-one".