2221101021 has 8 divisors (see below), whose sum is σ = 2965362624. Its totient is φ = 1478786720.

The previous prime is 2221101019. The next prime is 2221101041. The reversal of 2221101021 is 1201011222.

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

It is a cyclic number.

It is not a de Polignac number, because 2221101021 - 2¹ = 2221101019 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2221100988 and 2221101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221101041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484161 + ... + 488726.

It is an arithmetic number, because the mean of its divisors is an integer number (370670328).

Almost surely, 2^2221101021 is an apocalyptic number.

It is an amenable number.

2221101021 is a deficient number, since it is larger than the sum of its proper divisors (744261603).

2221101021 is an equidigital number, since it uses as much as digits as its factorization.

2221101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973651.

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

The square root of 2221101021 is about 47128.5584438990. The cubic root of 2221101021 is about 1304.7363757499.

Adding to 2221101021 its reverse (1201011222), we get a palindrome (3422112243).

The spelling of 2221101021 in words is "two billion, two hundred twenty-one million, one hundred one thousand, twenty-one".