2212101221221 has 8 divisors (see below), whose sum is σ = 2265318041184. Its totient is φ = 2158964974320.

The previous prime is 2212101221219. The next prime is 2212101221251. The reversal of 2212101221221 is 1221221012122.

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 2212101221221 - 2¹ = 2212101221219 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 (2212101221201) 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, 20087695 + ... + 20197516.

It is an arithmetic number, because the mean of its divisors is an integer number (283164755148).

Almost surely, 2^{2212101221221} is an apocalyptic number.

It is an amenable number.

2212101221221 is a deficient number, since it is larger than the sum of its proper divisors (53216819963).

2212101221221 is a wasteful number, since it uses less digits than its factorization.

2212101221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40286531.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2212101221221 its reverse (1221221012122), we get a palindrome (3433322233343).

The spelling of 2212101221221 in words is "two trillion, two hundred twelve billion, one hundred one million, two hundred twenty-one thousand, two hundred twenty-one".