2021221101 has 8 divisors (see below), whose sum is σ = 2714350240. Its totient is φ = 1337786352.

The previous prime is 2021221099. The next prime is 2021221109. The reversal of 2021221101 is 1011221202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2021221101 - 2¹ = 2021221099 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021221109) 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, 2423110 + ... + 2423943.

It is an arithmetic number, because the mean of its divisors is an integer number (339293780).

Almost surely, 2^2021221101 is an apocalyptic number.

It is an amenable number.

2021221101 is a deficient number, since it is larger than the sum of its proper divisors (693129139).

2021221101 is a wasteful number, since it uses less digits than its factorization.

2021221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4847195.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2021221101 is about 44957.9926264507. The cubic root of 2021221101 is about 1264.3615333818.

Adding to 2021221101 its reverse (1011221202), we get a palindrome (3032442303).

The spelling of 2021221101 in words is "two billion, twenty-one million, two hundred twenty-one thousand, one hundred one".