2201211211221 has 12 divisors (see below), whose sum is σ = 3468575242080. Its totient is φ = 1334067400680.

The previous prime is 2201211211219. The next prime is 2201211211291. The reversal of 2201211211221 is 1221121121022.

2201211211221 is a `hidden beast` number, since 2 + 20 + 1 + 211 + 211 + 221 = 666.

It is not a de Polignac number, because 2201211211221 - 2¹ = 2201211211219 is a prime.

It is a super-3 number, since 3×2201211211221³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2201211211194 and 2201211211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201211211211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11117228241 + ... + 11117228438.

It is an arithmetic number, because the mean of its divisors is an integer number (289047936840).

Almost surely, 2^{2201211211221} is an apocalyptic number.

It is an amenable number.

2201211211221 is a deficient number, since it is larger than the sum of its proper divisors (1267364030859).

2201211211221 is a wasteful number, since it uses less digits than its factorization.

2201211211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22234456696 (or 22234456693 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2201211211221 its reverse (1221121121022), we get a palindrome (3422332332243).

The spelling of 2201211211221 in words is "two trillion, two hundred one billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-one".