2213212021 has 8 divisors (see below), whose sum is σ = 2319920064. Its totient is φ = 2109014880.

The previous prime is 2213212019. The next prime is 2213212073. The reversal of 2213212021 is 1202123122.

It is a happy number.

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 2213212021 - 2¹ = 2213212019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2213211986 and 2213212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213212081) 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, 625921 + ... + 629446.

It is an arithmetic number, because the mean of its divisors is an integer number (289990008).

Almost surely, 2^2213212021 is an apocalyptic number.

It is an amenable number.

2213212021 is a deficient number, since it is larger than the sum of its proper divisors (106708043).

2213212021 is a wasteful number, since it uses less digits than its factorization.

2213212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255451.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2213212021 is about 47044.7873945669. The cubic root of 2213212021 is about 1303.1898040689.

Adding to 2213212021 its reverse (1202123122), we get a palindrome (3415335143).

The spelling of 2213212021 in words is "two billion, two hundred thirteen million, two hundred twelve thousand, twenty-one".