21202332001 has 4 divisors (see below), whose sum is σ = 21235409604. Its totient is φ = 21169254400.

The previous prime is 21202331999. The next prime is 21202332023. The reversal of 21202332001 is 10023320212.

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 12333213025 + 8869118976 = 111055^2 + 94176^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202332001 - 2¹ = 21202331999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202332031) 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, 16537840 + ... + 16539121.

It is an arithmetic number, because the mean of its divisors is an integer number (5308852401).

Almost surely, 2^21202332001 is an apocalyptic number.

It is an amenable number.

21202332001 is a deficient number, since it is larger than the sum of its proper divisors (33077603).

21202332001 is an equidigital number, since it uses as much as digits as its factorization.

21202332001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33077602.

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

Adding to 21202332001 its reverse (10023320212), we get a palindrome (31225652213).

The spelling of 21202332001 in words is "twenty-one billion, two hundred two million, three hundred thirty-two thousand, one".