1220403103420 has 48 divisors (see below), whose sum is σ = 2633790585888. Its totient is φ = 474664907520.

The previous prime is 1220403103373. The next prime is 1220403103463. The reversal of 1220403103420 is 243013040221.

It is a junction number, because it is equal to n+sod(n) for n = 1220403103391 and 1220403103400.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 637654 + ... + 1687426.

It is an arithmetic number, because the mean of its divisors is an integer number (54870637206).

Almost surely, 2^{1220403103420} is an apocalyptic number.

1220403103420 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 1220403103420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1316895292944).

1220403103420 is an abundant number, since it is smaller than the sum of its proper divisors (1413387482468).

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

1220403103420 is a wasteful number, since it uses less digits than its factorization.

1220403103420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051390 (or 1051388 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 1220403103420 its reverse (243013040221), we get a palindrome (1463416143641).

The spelling of 1220403103420 in words is "one trillion, two hundred twenty billion, four hundred three million, one hundred three thousand, four hundred twenty".