2201030021 has 4 divisors (see below), whose sum is σ = 2201251500. Its totient is φ = 2200808544.

The previous prime is 2201030017. The next prime is 2201030059. The reversal of 2201030021 is 1200301022.

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 1307617921 + 893412100 = 36161^2 + 29890^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201030021 - 2² = 2201030017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201029984 and 2201030011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2203030021) 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, 95096 + ... + 115953.

It is an arithmetic number, because the mean of its divisors is an integer number (550312875).

Almost surely, 2^2201030021 is an apocalyptic number.

It is an amenable number.

2201030021 is a deficient number, since it is larger than the sum of its proper divisors (221479).

2201030021 is a wasteful number, since it uses less digits than its factorization.

2201030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221478.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2201030021 is about 46915.1363740957. The cubic root of 2201030021 is about 1300.7943904102.

Adding to 2201030021 its reverse (1200301022), we get a palindrome (3401331043).

The spelling of 2201030021 in words is "two billion, two hundred one million, thirty thousand, twenty-one".