21020332003213 has 4 divisors (see below), whose sum is σ = 22126665266560. Its totient is φ = 19913998739868.

The previous prime is 21020332003183. The next prime is 21020332003247. The reversal of 21020332003213 is 31230023302012.

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.

It is a cyclic number.

It is not a de Polignac number, because 21020332003213 - 2⁹ = 21020332002701 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 (21020332001213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553166631645 + ... + 553166631682.

It is an arithmetic number, because the mean of its divisors is an integer number (5531666316640).

Almost surely, 2^{21020332003213} is an apocalyptic number.

It is an amenable number.

21020332003213 is a deficient number, since it is larger than the sum of its proper divisors (1106333263347).

21020332003213 is a wasteful number, since it uses less digits than its factorization.

21020332003213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106333263346.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21020332003213 its reverse (31230023302012), we get a palindrome (52250355305225).

The spelling of 21020332003213 in words is "twenty-one trillion, twenty billion, three hundred thirty-two million, three thousand, two hundred thirteen".