121434430243440 has 80 divisors (see below), whose sum is σ = 376455434560128. Its totient is φ = 32381766275328.

The previous prime is 121434430243361. The next prime is 121434430243457. The reversal of 121434430243440 is 44342034434121.

It is a happy number.

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

It is a congruent number.

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, 4596879 + ... + 16248081.

Almost surely, 2^{121434430243440} is an apocalyptic number.

121434430243440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121434430243440 is an abundant number, since it is smaller than the sum of its proper divisors (255021004316688).

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

121434430243440 is a wasteful number, since it uses less digits than its factorization.

121434430243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11694646 (or 11694640 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 39.

Adding to 121434430243440 its reverse (44342034434121), we get a palindrome (165776464677561).

The spelling of 121434430243440 in words is "one hundred twenty-one trillion, four hundred thirty-four billion, four hundred thirty million, two hundred forty-three thousand, four hundred forty".