1035221521 has 4 divisors (see below), whose sum is σ = 1038529252. Its totient is φ = 1031913792.

The previous prime is 1035221519. The next prime is 1035221531. The reversal of 1035221521 is 1251225301.

1035221521 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.

It can be written as a sum of positive squares in 2 ways, for example, as 239135296 + 796086225 = 15464^2 + 28215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1035221521 - 2¹ = 1035221519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1035221492 and 1035221501.

It is not an unprimeable number, because it can be changed into a prime (1035221501) 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, 1653396 + ... + 1654021.

It is an arithmetic number, because the mean of its divisors is an integer number (259632313).

Almost surely, 2^1035221521 is an apocalyptic number.

It is an amenable number.

1035221521 is a deficient number, since it is larger than the sum of its proper divisors (3307731).

1035221521 is an equidigital number, since it uses as much as digits as its factorization.

1035221521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307730.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1035221521 is about 32174.8585233875. The cubic root of 1035221521 is about 1011.6053029313.

Adding to 1035221521 its reverse (1251225301), we get a palindrome (2286446822).

The spelling of 1035221521 in words is "one billion, thirty-five million, two hundred twenty-one thousand, five hundred twenty-one".