221220100320023 has 16 divisors (see below), whose sum is σ = 256290686181696. Its totient is φ = 187016531961600.

The previous prime is 221220100320013. The next prime is 221220100320031. The reversal of 221220100320023 is 320023001022122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221220100320023 - 2⁸ = 221220100319767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221220100319977 and 221220100320004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220100320013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26423465 + ... + 33773357.

It is an arithmetic number, because the mean of its divisors is an integer number (16018167886356).

Almost surely, 2^{221220100320023} is an apocalyptic number.

221220100320023 is a deficient number, since it is larger than the sum of its proper divisors (35070585861673).

221220100320023 is an equidigital number, since it uses as much as digits as its factorization.

221220100320023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7408874.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221220100320023 its reverse (320023001022122), we get a palindrome (541243101342145).

The spelling of 221220100320023 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred million, three hundred twenty thousand, twenty-three".