1200421324240 has 20 divisors (see below), whose sum is σ = 2790979579044. Its totient is φ = 480168529664.

The previous prime is 1200421324237. The next prime is 1200421324253. The reversal of 1200421324240 is 424231240021.

It can be written as a sum of positive squares in 2 ways, for example, as 860271090064 + 340150234176 = 927508^2 + 583224^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1200421324240² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7502633197 + ... + 7502633356.

Almost surely, 2^{1200421324240} is an apocalyptic number.

1200421324240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200421324240 is an abundant number, since it is smaller than the sum of its proper divisors (1590558254804).

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

1200421324240 is a wasteful number, since it uses less digits than its factorization.

1200421324240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15005266566 (or 15005266560 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1200421324240 its reverse (424231240021), we get a palindrome (1624652564261).

The spelling of 1200421324240 in words is "one trillion, two hundred billion, four hundred twenty-one million, three hundred twenty-four thousand, two hundred forty".