2213122621 has 2 divisors, whose sum is σ = 2213122622. Its totient is φ = 2213122620.

The previous prime is 2213122589. The next prime is 2213122649. The reversal of 2213122621 is 1262213122.

It is a happy number.

2213122621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2189210521 + 23912100 = 46789^2 + 4890^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213122621 - 2⁵ = 2213122589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2213122592 and 2213122601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2213123621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106561310 + 1106561311.

It is an arithmetic number, because the mean of its divisors is an integer number (1106561311).

Almost surely, 2^2213122621 is an apocalyptic number.

It is an amenable number.

2213122621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2213122621 is an equidigital number, since it uses as much as digits as its factorization.

2213122621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 2213122621 is about 47043.8372265699. The cubic root of 2213122621 is about 1303.1722569118.

Adding to 2213122621 its reverse (1262213122), we get a palindrome (3475335743).

The spelling of 2213122621 in words is "two billion, two hundred thirteen million, one hundred twenty-two thousand, six hundred twenty-one".