2252213022221 has 4 divisors (see below), whose sum is σ = 2252256659772. Its totient is φ = 2252169384672.

The previous prime is 2252213022217. The next prime is 2252213022223. The reversal of 2252213022221 is 1222203122522.

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 1814379366121 + 437833656100 = 1346989^2 + 661690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2252213022221 - 2² = 2252213022217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2252213022223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21741266 + ... + 21844611.

It is an arithmetic number, because the mean of its divisors is an integer number (563064164943).

Almost surely, 2^{2252213022221} is an apocalyptic number.

It is an amenable number.

2252213022221 is a deficient number, since it is larger than the sum of its proper divisors (43637551).

2252213022221 is an equidigital number, since it uses as much as digits as its factorization.

2252213022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43637550.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 2252213022221 its reverse (1222203122522), we get a palindrome (3474416144743).

The spelling of 2252213022221 in words is "two trillion, two hundred fifty-two billion, two hundred thirteen million, twenty-two thousand, two hundred twenty-one".