2212001221 has 8 divisors (see below), whose sum is σ = 2217924864. Its totient is φ = 2206086960.

The previous prime is 2212001203. The next prime is 2212001293. The reversal of 2212001221 is 1221002122.

It is a happy number.

2212001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2212001221 - 2⁹ = 2212000709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212001021) 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, 754260 + ... + 757186.

It is an arithmetic number, because the mean of its divisors is an integer number (277240608).

Almost surely, 2^2212001221 is an apocalyptic number.

It is an amenable number.

2212001221 is a deficient number, since it is larger than the sum of its proper divisors (5923643).

2212001221 is a wasteful number, since it uses less digits than its factorization.

2212001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4691.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2212001221 is about 47031.9170457680. The cubic root of 2212001221 is about 1302.9521118170.

Adding to 2212001221 its reverse (1221002122), we get a palindrome (3433003343).

Subtracting from 2212001221 its reverse (1221002122), we obtain a palindrome (990999099).

The spelling of 2212001221 in words is "two billion, two hundred twelve million, one thousand, two hundred twenty-one".