2210213121221 has 12 divisors (see below), whose sum is σ = 2591308850688. Its totient is φ = 1879551310392.

The previous prime is 2210213121191. The next prime is 2210213121227. The reversal of 2210213121221 is 1221213120122.

2210213121221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2210213121221 - 2³⁴ = 2193033252037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210213121193 and 2210213121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210213121227) 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, 177577991 + ... + 177590436.

It is an arithmetic number, because the mean of its divisors is an integer number (215942404224).

Almost surely, 2^{2210213121221} is an apocalyptic number.

It is an amenable number.

2210213121221 is a deficient number, since it is larger than the sum of its proper divisors (381095729467).

2210213121221 is a wasteful number, since it uses less digits than its factorization.

2210213121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355168568 (or 355168561 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2210213121221 its reverse (1221213120122), we get a palindrome (3431426241343).

The spelling of 2210213121221 in words is "two trillion, two hundred ten billion, two hundred thirteen million, one hundred twenty-one thousand, two hundred twenty-one".