2221122021 has 8 divisors (see below), whose sum is σ = 3117364320. Its totient is φ = 1402813872.

The previous prime is 2221122019. The next prime is 2221122023. The reversal of 2221122021 is 1202211222.

It is an interprime number because it is at equal distance from previous prime (2221122019) and next prime (2221122023).

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

It is not a de Polignac number, because 2221122021 - 2¹ = 2221122019 is a prime.

It is a super-2 number, since 2×2221122021² = 9866766064342248882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221122023) 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, 19483470 + ... + 19483583.

It is an arithmetic number, because the mean of its divisors is an integer number (389670540).

Almost surely, 2^2221122021 is an apocalyptic number.

It is an amenable number.

2221122021 is a deficient number, since it is larger than the sum of its proper divisors (896242299).

2221122021 is a wasteful number, since it uses less digits than its factorization.

2221122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38967075.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2221122021 is about 47128.7812382200. The cubic root of 2221122021 is about 1304.7404877312.

Adding to 2221122021 its reverse (1202211222), we get a palindrome (3423333243).

The spelling of 2221122021 in words is "two billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".