2201222211221 has 12 divisors (see below), whose sum is σ = 2420127796800. Its totient is φ = 2000612746440.

The previous prime is 2201222211217. The next prime is 2201222211257. The reversal of 2201222211221 is 1221122221022.

It is not a de Polignac number, because 2201222211221 - 2² = 2201222211217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201222211193 and 2201222211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201222291221) 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, 1776941 + ... + 2749538.

It is an arithmetic number, because the mean of its divisors is an integer number (201677316400).

Almost surely, 2^{2201222211221} is an apocalyptic number.

It is an amenable number.

2201222211221 is a deficient number, since it is larger than the sum of its proper divisors (218905585579).

2201222211221 is a wasteful number, since it uses less digits than its factorization.

2201222211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4530520 (or 4530509 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2201222211221 its reverse (1221122221022), we get a palindrome (3422344432243).

The spelling of 2201222211221 in words is "two trillion, two hundred one billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty-one".