2210212233221 has 4 divisors (see below), whose sum is σ = 2210325036012. Its totient is φ = 2210099430432.

The previous prime is 2210212233191. The next prime is 2210212233241. The reversal of 2210212233221 is 1223322120122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1327993492996 + 882218740225 = 1152386^2 + 939265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2210212233221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210212233241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56372000 + ... + 56411193.

It is an arithmetic number, because the mean of its divisors is an integer number (552581259003).

Almost surely, 2^{2210212233221} is an apocalyptic number.

It is an amenable number.

2210212233221 is a deficient number, since it is larger than the sum of its proper divisors (112802791).

2210212233221 is a wasteful number, since it uses less digits than its factorization.

2210212233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112802790.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2210212233221 its reverse (1223322120122), we get a palindrome (3433534353343).

The spelling of 2210212233221 in words is "two trillion, two hundred ten billion, two hundred twelve million, two hundred thirty-three thousand, two hundred twenty-one".