23021301221 has 4 divisors (see below), whose sum is σ = 23106250944. Its totient is φ = 22936351500.

The previous prime is 23021301187. The next prime is 23021301263. The reversal of 23021301221 is 12210312032.

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 a cyclic number.

It is not a de Polignac number, because 23021301221 - 2⁶ = 23021301157 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 23021301221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021301421) 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, 42474455 + ... + 42474996.

It is an arithmetic number, because the mean of its divisors is an integer number (5776562736).

Almost surely, 2^23021301221 is an apocalyptic number.

It is an amenable number.

23021301221 is a deficient number, since it is larger than the sum of its proper divisors (84949723).

23021301221 is an equidigital number, since it uses as much as digits as its factorization.

23021301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84949722.

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

Adding to 23021301221 its reverse (12210312032), we get a palindrome (35231613253).

The spelling of 23021301221 in words is "twenty-three billion, twenty-one million, three hundred one thousand, two hundred twenty-one".