123303205501 has 48 divisors (see below), whose sum is σ = 149661388800. Its totient is φ = 101206621152.

The previous prime is 123303205489. The next prime is 123303205507. The reversal of 123303205501 is 105502303321.

It is not a de Polignac number, because 123303205501 - 2¹³ = 123303197309 is a prime.

It is a super-2 number, since 2×123303205501² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123303205507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55069540 + ... + 55071778.

It is an arithmetic number, because the mean of its divisors is an integer number (3117945600).

Almost surely, 2^123303205501 is an apocalyptic number.

It is an amenable number.

123303205501 is a deficient number, since it is larger than the sum of its proper divisors (26358183299).

123303205501 is a wasteful number, since it uses less digits than its factorization.

123303205501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798 (or 2791 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 123303205501 its reverse (105502303321), we get a palindrome (228805508822).

The spelling of 123303205501 in words is "one hundred twenty-three billion, three hundred three million, two hundred five thousand, five hundred one".