123040442000 has 80 divisors (see below), whose sum is σ = 340013511552. Its totient is φ = 42185289600.

The previous prime is 123040441999. The next prime is 123040442017. The reversal of 123040442000 is 244040321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×123040442000³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4380302 + ... + 4408301.

Almost surely, 2^123040442000 is an apocalyptic number.

123040442000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123040442000 is an abundant number, since it is smaller than the sum of its proper divisors (216973069552).

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

123040442000 is an equidigital number, since it uses as much as digits as its factorization.

123040442000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8788633 (or 8788617 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 123040442000 its reverse (244040321), we get a palindrome (123284482321).

The spelling of 123040442000 in words is "one hundred twenty-three billion, forty million, four hundred forty-two thousand".