1221084024 has 32 divisors (see below), whose sum is σ = 3232282320. Its totient is φ = 383085056.

The previous prime is 1221083993. The next prime is 1221084049. The reversal of 1221084024 is 4204801221.

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

It is a junction number, because it is equal to n+sod(n) for n = 1221083985 and 1221084003.

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, 1496019 + ... + 1496834.

Almost surely, 2^1221084024 is an apocalyptic number.

It is an amenable number.

1221084024 is an abundant number, since it is smaller than the sum of its proper divisors (2011198296).

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

1221084024 is a wasteful number, since it uses less digits than its factorization.

1221084024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992879 (or 2992875 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 1221084024 is about 34944.0127060416. The cubic root of 1221084024 is about 1068.8461151136.

Adding to 1221084024 its reverse (4204801221), we get a palindrome (5425885245).

The spelling of 1221084024 in words is "one billion, two hundred twenty-one million, eighty-four thousand, twenty-four".