23211300221 has 4 divisors (see below), whose sum is σ = 23212572252. Its totient is φ = 23210028192.

The previous prime is 23211300199. The next prime is 23211300257. The reversal of 23211300221 is 12200311232.

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 11289062500 + 11922237721 = 106250^2 + 109189^2 .

It is a cyclic number.

It is not a de Polignac number, because 23211300221 - 2⁶ = 23211300157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23211300221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23211300121) 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, 608240 + ... + 645273.

It is an arithmetic number, because the mean of its divisors is an integer number (5803143063).

Almost surely, 2^23211300221 is an apocalyptic number.

It is an amenable number.

23211300221 is a deficient number, since it is larger than the sum of its proper divisors (1272031).

23211300221 is a wasteful number, since it uses less digits than its factorization.

23211300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272030.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 23211300221 its reverse (12200311232), we get a palindrome (35411611453).

The spelling of 23211300221 in words is "twenty-three billion, two hundred eleven million, three hundred thousand, two hundred twenty-one".