213010003021 has 4 divisors (see below), whose sum is σ = 213355238652. Its totient is φ = 212664767392.

The previous prime is 213010003013. The next prime is 213010003039. The reversal of 213010003021 is 120300010312.

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 12346320996 + 200663682025 = 111114^2 + 447955^2 .

It is a cyclic number.

It is not a de Polignac number, because 213010003021 - 2³ = 213010003013 is a prime.

It is a super-2 number, since 2×213010003021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213010002992 and 213010003010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213010004021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172616890 + ... + 172618123.

It is an arithmetic number, because the mean of its divisors is an integer number (53338809663).

Almost surely, 2^213010003021 is an apocalyptic number.

It is an amenable number.

213010003021 is a deficient number, since it is larger than the sum of its proper divisors (345235631).

213010003021 is an equidigital number, since it uses as much as digits as its factorization.

213010003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345235630.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 213010003021 its reverse (120300010312), we get a palindrome (333310013333).

The spelling of 213010003021 in words is "two hundred thirteen billion, ten million, three thousand, twenty-one".