2201020021001 has 4 divisors (see below), whose sum is σ = 2201023432212. Its totient is φ = 2201016609792.

The previous prime is 2201020020949. The next prime is 2201020021021. The reversal of 2201020021001 is 1001200201022.

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 941047445776 + 1259972575225 = 970076^2 + 1122485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201020021001 - 2³⁰ = 2199946279177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2201020021021) 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, 409400 + ... + 2137673.

It is an arithmetic number, because the mean of its divisors is an integer number (550255858053).

Almost surely, 2^{2201020021001} is an apocalyptic number.

It is an amenable number.

2201020021001 is a deficient number, since it is larger than the sum of its proper divisors (3411211).

2201020021001 is an equidigital number, since it uses as much as digits as its factorization.

2201020021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411210.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2201020021001 its reverse (1001200201022), we get a palindrome (3202220222023).

The spelling of 2201020021001 in words is "two trillion, two hundred one billion, twenty million, twenty-one thousand, one".