220001101112021 has 4 divisors (see below), whose sum is σ = 227097910825344. Its totient is φ = 212904291398700.

The previous prime is 220001101111933. The next prime is 220001101112033. The reversal of 220001101112021 is 120211101100022.

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 not a de Polignac number, because 220001101112021 - 2³⁴ = 219983921242837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220001101111987 and 220001101112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001101112621) 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, 3548404856615 + ... + 3548404856676.

It is an arithmetic number, because the mean of its divisors is an integer number (56774477706336).

Almost surely, 2^{220001101112021} is an apocalyptic number.

It is an amenable number.

220001101112021 is a deficient number, since it is larger than the sum of its proper divisors (7096809713323).

220001101112021 is an equidigital number, since it uses as much as digits as its factorization.

220001101112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7096809713322.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 220001101112021 its reverse (120211101100022), we get a palindrome (340212202212043).

The spelling of 220001101112021 in words is "two hundred twenty trillion, one billion, one hundred one million, one hundred twelve thousand, twenty-one".