1220212044240 has 160 divisors (see below), whose sum is σ = 4324952399616. Its totient is φ = 278782033920.

The previous prime is 1220212044131. The next prime is 1220212044329. The reversal of 1220212044240 is 424402120221.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1220212044240.

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 31 ways as a sum of consecutive naturals, for example, 3658870 + ... + 3978410.

Almost surely, 2^{1220212044240} is an apocalyptic number.

1220212044240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220212044240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2162476199808).

1220212044240 is an abundant number, since it is smaller than the sum of its proper divisors (3104740355376).

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

1220212044240 is a wasteful number, since it uses less digits than its factorization.

1220212044240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321837 (or 321831 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 1220212044240 its reverse (424402120221), we get a palindrome (1644614164461).

The spelling of 1220212044240 in words is "one trillion, two hundred twenty billion, two hundred twelve million, forty-four thousand, two hundred forty".