2201020021 has 4 divisors (see below), whose sum is σ = 2316863200. Its totient is φ = 2085176844.

The previous prime is 2201020013. The next prime is 2201020033. The reversal of 2201020021 is 1200201022.

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 a cyclic number.

It is not a de Polignac number, because 2201020021 - 2³ = 2201020013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201020621) 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, 57921561 + ... + 57921598.

It is an arithmetic number, because the mean of its divisors is an integer number (579215800).

Almost surely, 2^2201020021 is an apocalyptic number.

It is an amenable number.

2201020021 is a deficient number, since it is larger than the sum of its proper divisors (115843179).

2201020021 is a wasteful number, since it uses less digits than its factorization.

2201020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115843178.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2201020021 is about 46915.0297985624. The cubic root of 2201020021 is about 1300.7924204290.

Adding to 2201020021 its reverse (1200201022), we get a palindrome (3401221043).

The spelling of 2201020021 in words is "two billion, two hundred one million, twenty thousand, twenty-one".