1220421041340 has 192 divisors, whose sum is σ = 3657576384000. Its totient is φ = 302971060224.

The previous prime is 1220421041317. The next prime is 1220421041381. The reversal of 1220421041340 is 431401240221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220421041340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 326401191 + ... + 326404929.

It is an arithmetic number, because the mean of its divisors is an integer number (19049877000).

Almost surely, 2^{1220421041340} is an apocalyptic number.

1220421041340 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 1220421041340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828788192000).

1220421041340 is an abundant number, since it is smaller than the sum of its proper divisors (2437155342660).

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

1220421041340 is a wasteful number, since it uses less digits than its factorization.

1220421041340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7164 (or 7162 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1220421041340 its reverse (431401240221), we get a palindrome (1651822281561).

The spelling of 1220421041340 in words is "one trillion, two hundred twenty billion, four hundred twenty-one million, forty-one thousand, three hundred forty".