2211220122221 has 16 divisors (see below), whose sum is σ = 2463697071360. Its totient is φ = 1967323937280.

The previous prime is 2211220122211. The next prime is 2211220122313. The reversal of 2211220122221 is 1222210221122.

It is a cyclic number.

It is not a de Polignac number, because 2211220122221 - 2²² = 2211215927917 is a prime.

It is a super-3 number, since 3×2211220122221³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211220122193 and 2211220122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211220122211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10425785 + ... + 10635761.

It is an arithmetic number, because the mean of its divisors is an integer number (153981066960).

Almost surely, 2^{2211220122221} is an apocalyptic number.

It is an amenable number.

2211220122221 is a deficient number, since it is larger than the sum of its proper divisors (252476949139).

2211220122221 is a wasteful number, since it uses less digits than its factorization.

2211220122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230404.

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

Adding to 2211220122221 its reverse (1222210221122), we get a palindrome (3433430343343).

The spelling of 2211220122221 in words is "two trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty-two thousand, two hundred twenty-one".