1220421424 has 20 divisors (see below), whose sum is σ = 2379078136. Its totient is φ = 606465792.

The previous prime is 1220421403. The next prime is 1220421427. The reversal of 1220421424 is 4241240221.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 1220421395 and 1220421404.

It is not an unprimeable number, because it can be changed into a prime (1220421427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231369 + ... + 236584.

Almost surely, 2^1220421424 is an apocalyptic number.

It is an amenable number.

1220421424 is a deficient number, since it is larger than the sum of its proper divisors (1158656712).

1220421424 is a wasteful number, since it uses less digits than its factorization.

1220421424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468124 (or 468118 counting only the distinct ones).

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

The square root of 1220421424 is about 34934.5305392816. The cubic root of 1220421424 is about 1068.6527498848.

Adding to 1220421424 its reverse (4241240221), we get a palindrome (5461661645).

The spelling of 1220421424 in words is "one billion, two hundred twenty million, four hundred twenty-one thousand, four hundred twenty-four".