2212101221 has 8 divisors (see below), whose sum is σ = 2434558464. Its totient is φ = 1993203520.

The previous prime is 2212101209. The next prime is 2212101223. The reversal of 2212101221 is 1221012122.

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

It is a de Polignac number, because none of the positive numbers 2^k-2212101221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212101196 and 2212101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212101223) 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, 888581 + ... + 891066.

It is an arithmetic number, because the mean of its divisors is an integer number (304319808).

Almost surely, 2^2212101221 is an apocalyptic number.

It is an amenable number.

2212101221 is a deficient number, since it is larger than the sum of its proper divisors (222457243).

2212101221 is a wasteful number, since it uses less digits than its factorization.

2212101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779771.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2212101221 is about 47032.9801415985. The cubic root of 2212101221 is about 1302.9717461111.

Adding to 2212101221 its reverse (1221012122), we get a palindrome (3433113343).

The spelling of 2212101221 in words is "two billion, two hundred twelve million, one hundred one thousand, two hundred twenty-one".