1053213221 has 4 divisors (see below), whose sum is σ = 1055921100. Its totient is φ = 1050505344.

The previous prime is 1053213211. The next prime is 1053213229. The reversal of 1053213221 is 1223123501.

1053213221 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 67881121 + 985332100 = 8239^2 + 31390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1053213221 - 2⁶ = 1053213157 is a prime.

It is a super-2 number, since 2×1053213221² = 2218516177778389682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1053213193 and 1053213202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053213229) 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, 1353356 + ... + 1354133.

It is an arithmetic number, because the mean of its divisors is an integer number (263980275).

Almost surely, 2^1053213221 is an apocalyptic number.

It is an amenable number.

1053213221 is a deficient number, since it is larger than the sum of its proper divisors (2707879).

1053213221 is an equidigital number, since it uses as much as digits as its factorization.

1053213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707878.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1053213221 is about 32453.2466942831. The cubic root of 1053213221 is about 1017.4320965980.

Adding to 1053213221 its reverse (1223123501), we get a palindrome (2276336722).

The spelling of 1053213221 in words is "one billion, fifty-three million, two hundred thirteen thousand, two hundred twenty-one".