1024512221 has 4 divisors (see below), whose sum is σ = 1024595712. Its totient is φ = 1024428732.

The previous prime is 1024512217. The next prime is 1024512227. The reversal of 1024512221 is 1222154201.

1024512221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1222154201 = 233 ⋅5245297.

It is a cyclic number.

It is not a de Polignac number, because 1024512221 - 2² = 1024512217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1024512193 and 1024512202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1024512227) 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, 19325 + ... + 49218.

It is an arithmetic number, because the mean of its divisors is an integer number (256148928).

Almost surely, 2^1024512221 is an apocalyptic number.

It is an amenable number.

1024512221 is a deficient number, since it is larger than the sum of its proper divisors (83491).

1024512221 is an equidigital number, since it uses as much as digits as its factorization.

1024512221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83490.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1024512221 is about 32008.0024525118. The cubic root of 1024512221 is about 1008.1048738857.

Adding to 1024512221 its reverse (1222154201), we get a palindrome (2246666422).

The spelling of 1024512221 in words is "one billion, twenty-four million, five hundred twelve thousand, two hundred twenty-one".