2122210021221 has 24 divisors (see below), whose sum is σ = 3067758907200. Its totient is φ = 1413724980096.

The previous prime is 2122210021181. The next prime is 2122210021247. The reversal of 2122210021221 is 1221200122212.

It is a happy number.

2122210021221 is a `hidden beast` number, since 212 + 2 + 210 + 0 + 21 + 221 = 666.

It is not a de Polignac number, because 2122210021221 - 2¹³ = 2122210013029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2122210021194 and 2122210021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122210021621) 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 23 ways as a sum of consecutive naturals, for example, 103476850 + ... + 103497356.

It is an arithmetic number, because the mean of its divisors is an integer number (127823287800).

Almost surely, 2^{2122210021221} is an apocalyptic number.

It is an amenable number.

2122210021221 is a deficient number, since it is larger than the sum of its proper divisors (945548885979).

2122210021221 is a wasteful number, since it uses less digits than its factorization.

2122210021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28745 (or 28742 counting only the distinct ones).

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

Adding to 2122210021221 its reverse (1221200122212), we get a palindrome (3343410143433).

The spelling of 2122210021221 in words is "two trillion, one hundred twenty-two billion, two hundred ten million, twenty-one thousand, two hundred twenty-one".