1021443213 has 8 divisors (see below), whose sum is σ = 1556484928. Its totient is φ = 583681824.

The previous prime is 1021443187. The next prime is 1021443221. The reversal of 1021443213 is 3123441201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021443213 - 2⁸ = 1021442957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 48640153 = 1021443213 / (1 + 0 + 2 + 1 + 4 + 4 + 3 + 2 + 1 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021443213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021443253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24320056 + ... + 24320097.

It is an arithmetic number, because the mean of its divisors is an integer number (194560616).

Almost surely, 2^1021443213 is an apocalyptic number.

It is an amenable number.

1021443213 is a deficient number, since it is larger than the sum of its proper divisors (535041715).

1021443213 is an equidigital number, since it uses as much as digits as its factorization.

1021443213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48640163.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1021443213 is about 31960.0252346584. The cubic root of 1021443213 is about 1007.0972475785.

Adding to 1021443213 its reverse (3123441201), we get a palindrome (4144884414).

The spelling of 1021443213 in words is "one billion, twenty-one million, four hundred forty-three thousand, two hundred thirteen".