23100220221 has 16 divisors (see below), whose sum is σ = 33172325760. Its totient is φ = 14214329280.

The previous prime is 23100220217. The next prime is 23100220237. The reversal of 23100220221 is 12202200132.

It is a happy number.

It is not a de Polignac number, because 23100220221 - 2² = 23100220217 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23100220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23100220321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764835 + ... + 794463.

It is an arithmetic number, because the mean of its divisors is an integer number (2073270360).

Almost surely, 2^23100220221 is an apocalyptic number.

It is an amenable number.

23100220221 is a deficient number, since it is larger than the sum of its proper divisors (10072105539).

23100220221 is a wasteful number, since it uses less digits than its factorization.

23100220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49636.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 23100220221 its reverse (12202200132), we get a palindrome (35302420353).

The spelling of 23100220221 in words is "twenty-three billion, one hundred million, two hundred twenty thousand, two hundred twenty-one".