2201100021 has 8 divisors (see below), whose sum is σ = 3260888960. Its totient is φ = 1467399996.

The previous prime is 2201099981. The next prime is 2201100061. The reversal of 2201100021 is 1200011022.

2201100021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2201099981) and next prime (2201100061).

It is not a de Polignac number, because 2201100021 - 2¹¹ = 2201097973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201099976 and 2201100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201100061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40761085 + ... + 40761138.

It is an arithmetic number, because the mean of its divisors is an integer number (407611120).

Almost surely, 2^2201100021 is an apocalyptic number.

It is an amenable number.

2201100021 is a deficient number, since it is larger than the sum of its proper divisors (1059788939).

2201100021 is an equidigital number, since it uses as much as digits as its factorization.

2201100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81522232 (or 81522226 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2201100021 is about 46915.8823960501. The cubic root of 2201100021 is about 1300.8081801119.

Adding to 2201100021 its reverse (1200011022), we get a palindrome (3401111043).

The spelling of 2201100021 in words is "two billion, two hundred one million, one hundred thousand, twenty-one".