1020043213 has 4 divisors (see below), whose sum is σ = 1165763680. Its totient is φ = 874322748.

The previous prime is 1020043201. The next prime is 1020043217. The reversal of 1020043213 is 3123400201.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 3123400201 = 277 ⋅11275813.

It is a cyclic number.

It is not a de Polignac number, because 1020043213 - 2⁹ = 1020042701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020043217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72860223 + ... + 72860236.

It is an arithmetic number, because the mean of its divisors is an integer number (291440920).

Almost surely, 2^1020043213 is an apocalyptic number.

It is an amenable number.

1020043213 is a deficient number, since it is larger than the sum of its proper divisors (145720467).

1020043213 is an equidigital number, since it uses as much as digits as its factorization.

1020043213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145720466.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1020043213 is about 31938.1153639347. The cubic root of 1020043213 is about 1006.6369247800.

Adding to 1020043213 its reverse (3123400201), we get a palindrome (4143443414).

The spelling of 1020043213 in words is "one billion, twenty million, forty-three thousand, two hundred thirteen".