2122221021 has 8 divisors (see below), whose sum is σ = 2854669440. Its totient is φ = 1402293312.

The previous prime is 2122221019. The next prime is 2122221029. The reversal of 2122221021 is 1201222212.

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

It is not a de Polignac number, because 2122221021 - 2¹ = 2122221019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122221029) 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, 3129781 + ... + 3130458.

It is an arithmetic number, because the mean of its divisors is an integer number (356833680).

Almost surely, 2^2122221021 is an apocalyptic number.

It is an amenable number.

2122221021 is a deficient number, since it is larger than the sum of its proper divisors (732448419).

2122221021 is a wasteful number, since it uses less digits than its factorization.

2122221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6260355.

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

The square root of 2122221021 is about 46067.5701660072. The cubic root of 2122221021 is about 1285.0801165308.

Adding to 2122221021 its reverse (1201222212), we get a palindrome (3323443233).

The spelling of 2122221021 in words is "two billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-one".