2201210221221 has 24 divisors (see below), whose sum is σ = 3619381237056. Its totient is φ = 1276063895040.

The previous prime is 2201210221151. The next prime is 2201210221351. The reversal of 2201210221221 is 1221220121022.

It is a happy number.

2201210221221 is a `hidden beast` number, since 2 + 201 + 21 + 0 + 221 + 221 = 666.

It is not a de Polignac number, because 2201210221221 - 2³⁷ = 2063771267749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2201210221194 and 2201210221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201210221921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 483355260 + ... + 483359813.

It is an arithmetic number, because the mean of its divisors is an integer number (150807551544).

Almost surely, 2^{2201210221221} is an apocalyptic number.

It is an amenable number.

2201210221221 is a deficient number, since it is larger than the sum of its proper divisors (1418171015835).

2201210221221 is a wasteful number, since it uses less digits than its factorization.

2201210221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966715113 (or 966715110 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2201210221221 its reverse (1221220121022), we get a palindrome (3422430342243).

It can be divided in two parts, 220121022 and 1221, that multiplied together give a palindrome (268767767862).

The spelling of 2201210221221 in words is "two trillion, two hundred one billion, two hundred ten million, two hundred twenty-one thousand, two hundred twenty-one".