1212421323340 has 24 divisors (see below), whose sum is σ = 2656784118240. Its totient is φ = 463882940928.

The previous prime is 1212421323329. The next prime is 1212421323439. The reversal of 1212421323340 is 433231242121.

It is a junction number, because it is equal to n+sod(n) for n = 1212421323299 and 1212421323308.

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 7 ways as a sum of consecutive naturals, for example, 1317848805 + ... + 1317849724.

It is an arithmetic number, because the mean of its divisors is an integer number (110699338260).

Almost surely, 2^{1212421323340} is an apocalyptic number.

1212421323340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212421323340 is an abundant number, since it is smaller than the sum of its proper divisors (1444362794900).

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

1212421323340 is a wasteful number, since it uses less digits than its factorization.

1212421323340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635698561 (or 2635698559 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1212421323340 its reverse (433231242121), we get a palindrome (1645652565461).

The spelling of 1212421323340 in words is "one trillion, two hundred twelve billion, four hundred twenty-one million, three hundred twenty-three thousand, three hundred forty".