123121343000 has 32 divisors (see below), whose sum is σ = 288103944960. Its totient is φ = 49248536800.

The previous prime is 123121342961. The next prime is 123121343003. The reversal of 123121343000 is 343121321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123121343003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61559672 + ... + 61561671.

It is an arithmetic number, because the mean of its divisors is an integer number (9003248280).

Almost surely, 2^123121343000 is an apocalyptic number.

123121343000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123121343000 is an abundant number, since it is smaller than the sum of its proper divisors (164982601960).

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

123121343000 is a wasteful number, since it uses less digits than its factorization.

123121343000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123121364 (or 123121350 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123121343000 its reverse (343121321), we get a palindrome (123464464321).

The spelling of 123121343000 in words is "one hundred twenty-three billion, one hundred twenty-one million, three hundred forty-three thousand".