121212410424 has 32 divisors (see below), whose sum is σ = 346321173120. Its totient is φ = 34632117216.

The previous prime is 121212410419. The next prime is 121212410477. The reversal of 121212410424 is 424014212121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 121212410394 and 121212410403.

It is a congruent number.

It is an unprimeable number.

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, 360751054 + ... + 360751389.

It is an arithmetic number, because the mean of its divisors is an integer number (10822536660).

Almost surely, 2^121212410424 is an apocalyptic number.

121212410424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121212410424 is an abundant number, since it is smaller than the sum of its proper divisors (225108762696).

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

121212410424 is a wasteful number, since it uses less digits than its factorization.

121212410424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721502459 (or 721502455 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 121212410424 its reverse (424014212121), we get a palindrome (545226622545).

The spelling of 121212410424 in words is "one hundred twenty-one billion, two hundred twelve million, four hundred ten thousand, four hundred twenty-four".