21143322201 has 4 divisors (see below), whose sum is σ = 28191096272. Its totient is φ = 14095548132.

The previous prime is 21143322199. The next prime is 21143322209. The reversal of 21143322201 is 10222334112.

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 not a de Polignac number, because 21143322201 - 2¹ = 21143322199 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21143322209) 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, 3523887031 + ... + 3523887036.

It is an arithmetic number, because the mean of its divisors is an integer number (7047774068).

Almost surely, 2^21143322201 is an apocalyptic number.

It is an amenable number.

21143322201 is a deficient number, since it is larger than the sum of its proper divisors (7047774071).

21143322201 is an equidigital number, since it uses as much as digits as its factorization.

21143322201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047774070.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21143322201 its reverse (10222334112), we get a palindrome (31365656313).

The spelling of 21143322201 in words is "twenty-one billion, one hundred forty-three million, three hundred twenty-two thousand, two hundred one".