21302011233021 has 16 divisors (see below), whose sum is σ = 28555038119936. Its totient is φ = 14125189349376.

The previous prime is 21302011232941. The next prime is 21302011233029. The reversal of 21302011233021 is 12033211020312.

It is not a de Polignac number, because 21302011233021 - 2⁷ = 21302011232893 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 (21302011233029) 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 15 ways as a sum of consecutive naturals, for example, 156580 + ... + 6529053.

It is an arithmetic number, because the mean of its divisors is an integer number (1784689882496).

Almost surely, 2^{21302011233021} is an apocalyptic number.

It is an amenable number.

21302011233021 is a deficient number, since it is larger than the sum of its proper divisors (7253026886915).

21302011233021 is a wasteful number, since it uses less digits than its factorization.

21302011233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6691332.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21302011233021 its reverse (12033211020312), we get a palindrome (33335222253333).

The spelling of 21302011233021 in words is "twenty-one trillion, three hundred two billion, eleven million, two hundred thirty-three thousand, twenty-one".