123303512240 has 40 divisors (see below), whose sum is σ = 286719700848. Its totient is φ = 49314689280.

The previous prime is 123303512197. The next prime is 123303512249. The reversal of 123303512240 is 42215303321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×123303512240² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123303512249) 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, 508559 + ... + 710801.

Almost surely, 2^123303512240 is an apocalyptic number.

123303512240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123303512240 is an abundant number, since it is smaller than the sum of its proper divisors (163416188608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123303512240 is a wasteful number, since it uses less digits than its factorization.

123303512240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209877 (or 209871 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 123303512240 its reverse (42215303321), we get a palindrome (165518815561).

The spelling of 123303512240 in words is "one hundred twenty-three billion, three hundred three million, five hundred twelve thousand, two hundred forty".