23020021320221 has 4 divisors (see below), whose sum is σ = 23020054925244. Its totient is φ = 23019987715200.

The previous prime is 23020021320211. The next prime is 23020021320223. The reversal of 23020021320221 is 12202312002032.

It is a happy number.

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 12077084544100 + 10942936776121 = 3475210^2 + 3308011^2 .

It is a cyclic number.

It is not a de Polignac number, because 23020021320221 - 2⁶ = 23020021320157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23020021320193 and 23020021320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23020021320223) 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, 15753140 + ... + 17152301.

It is an arithmetic number, because the mean of its divisors is an integer number (5755013731311).

Almost surely, 2^{23020021320221} is an apocalyptic number.

It is an amenable number.

23020021320221 is a deficient number, since it is larger than the sum of its proper divisors (33605023).

23020021320221 is an equidigital number, since it uses as much as digits as its factorization.

23020021320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33605022.

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

Adding to 23020021320221 its reverse (12202312002032), we get a palindrome (35222333322253).

The spelling of 23020021320221 in words is "twenty-three trillion, twenty billion, twenty-one million, three hundred twenty thousand, two hundred twenty-one".