1220012422420 has 24 divisors (see below), whose sum is σ = 2794937550048. Its totient is φ = 443640880800.

The previous prime is 1220012422357. The next prime is 1220012422463. The reversal of 1220012422420 is 242242100221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1220012422391 and 1220012422400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2772755286 + ... + 2772755725.

It is an arithmetic number, because the mean of its divisors is an integer number (116455731252).

Almost surely, 2^{1220012422420} is an apocalyptic number.

1220012422420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220012422420 is an abundant number, since it is smaller than the sum of its proper divisors (1574925127628).

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

1220012422420 is a wasteful number, since it uses less digits than its factorization.

1220012422420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5545511031 (or 5545511029 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 1220012422420 its reverse (242242100221), we get a palindrome (1462254522641).

The spelling of 1220012422420 in words is "one trillion, two hundred twenty billion, twelve million, four hundred twenty-two thousand, four hundred twenty".