21032202332021 has 4 divisors (see below), whose sum is σ = 21032212267500. Its totient is φ = 21032192396544.

The previous prime is 21032202331997. The next prime is 21032202332023. The reversal of 21032202332021 is 12023320223012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2914835729521 + 18117366602500 = 1707289^2 + 4256450^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032202332021 - 2⁴² = 16634155820917 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 (21032202332023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380396 + ... + 6496853.

It is an arithmetic number, because the mean of its divisors is an integer number (5258053066875).

Almost surely, 2^{21032202332021} is an apocalyptic number.

It is an amenable number.

21032202332021 is a deficient number, since it is larger than the sum of its proper divisors (9935479).

21032202332021 is an equidigital number, since it uses as much as digits as its factorization.

21032202332021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9935478.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21032202332021 its reverse (12023320223012), we get a palindrome (33055522555033).

The spelling of 21032202332021 in words is "twenty-one trillion, thirty-two billion, two hundred two million, three hundred thirty-two thousand, twenty-one".