2122201221021 has 64 divisors (see below), whose sum is σ = 3718344499200. Its totient is φ = 1170460767168.

The previous prime is 2122201220989. The next prime is 2122201221037. The reversal of 2122201221021 is 1201221022212.

It is a happy number.

2122201221021 is a `hidden beast` number, since 212 + 220 + 1 + 2 + 210 + 21 = 666.

It is not a de Polignac number, because 2122201221021 - 2⁵ = 2122201220989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2122201220985 and 2122201221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122201221221) 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 63 ways as a sum of consecutive naturals, for example, 15976746 + ... + 16109028.

It is an arithmetic number, because the mean of its divisors is an integer number (58099132800).

Almost surely, 2^{2122201221021} is an apocalyptic number.

2122201221021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2122201221021 is a deficient number, since it is larger than the sum of its proper divisors (1596143278179).

2122201221021 is a wasteful number, since it uses less digits than its factorization.

2122201221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135255 (or 135249 counting only the distinct ones).

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

Adding to 2122201221021 its reverse (1201221022212), we get a palindrome (3323422243233).

The spelling of 2122201221021 in words is "two trillion, one hundred twenty-two billion, two hundred one million, two hundred twenty-one thousand, twenty-one".