21233132002001 has 4 divisors (see below), whose sum is σ = 21324261324132. Its totient is φ = 21142002679872.

The previous prime is 21233132001971. The next prime is 21233132002013. The reversal of 21233132002001 is 10020023133212.

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 10374525344401 + 10858606657600 = 3220951^2 + 3295240^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233132002001 - 2⁶ = 21233132001937 is a prime.

It is a super-2 number, since 2×21233132002001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233132602001) 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, 45564660716 + ... + 45564661181.

It is an arithmetic number, because the mean of its divisors is an integer number (5331065331033).

Almost surely, 2^{21233132002001} is an apocalyptic number.

It is an amenable number.

21233132002001 is a deficient number, since it is larger than the sum of its proper divisors (91129322131).

21233132002001 is an equidigital number, since it uses as much as digits as its factorization.

21233132002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91129322130.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21233132002001 its reverse (10020023133212), we get a palindrome (31253155135213).

The spelling of 21233132002001 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred thirty-two million, two thousand, one".