1212320344240 has 80 divisors (see below), whose sum is σ = 2826329415840. Its totient is φ = 483607756800.

The previous prime is 1212320344223. The next prime is 1212320344267. The reversal of 1212320344240 is 424430232121.

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

It is a junction number, because it is equal to n+sod(n) for n = 1212320344199 and 1212320344208.

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, 48501666 + ... + 48526654.

It is an arithmetic number, because the mean of its divisors is an integer number (35329117698).

Almost surely, 2^{1212320344240} is an apocalyptic number.

1212320344240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212320344240 is an abundant number, since it is smaller than the sum of its proper divisors (1614009071600).

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

1212320344240 is a wasteful number, since it uses less digits than its factorization.

1212320344240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26630 (or 26624 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1212320344240 its reverse (424430232121), we get a palindrome (1636750576361).

The spelling of 1212320344240 in words is "one trillion, two hundred twelve billion, three hundred twenty million, three hundred forty-four thousand, two hundred forty".