243400121400 has 96 divisors (see below), whose sum is σ = 798925137840. Its totient is φ = 61088655360.

The previous prime is 243400121399. The next prime is 243400121453. The reversal of 243400121400 is 4121004342.

243400121400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11921179 + ... + 11941578.

Almost surely, 2^243400121400 is an apocalyptic number.

243400121400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243400121400 is an abundant number, since it is smaller than the sum of its proper divisors (555525016440).

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

243400121400 is a wasteful number, since it uses less digits than its factorization.

243400121400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23862793 (or 23862784 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 243400121400 its reverse (4121004342), we get a palindrome (247521125742).

The spelling of 243400121400 in words is "two hundred forty-three billion, four hundred million, one hundred twenty-one thousand, four hundred".