2210232821 has 2 divisors, whose sum is σ = 2210232822. Its totient is φ = 2210232820.

The previous prime is 2210232799. The next prime is 2210232833. The reversal of 2210232821 is 1282320122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1302415921 + 907816900 = 36089^2 + 30130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210232821 - 2²² = 2206038517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2210232841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105116410 + 1105116411.

It is an arithmetic number, because the mean of its divisors is an integer number (1105116411).

Almost surely, 2^2210232821 is an apocalyptic number.

It is an amenable number.

2210232821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2210232821 is an equidigital number, since it uses as much as digits as its factorization.

2210232821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2210232821 is about 47013.1132876775. The cubic root of 2210232821 is about 1302.6048011576.

Adding to 2210232821 its reverse (1282320122), we get a palindrome (3492552943).

The spelling of 2210232821 in words is "two billion, two hundred ten million, two hundred thirty-two thousand, eight hundred twenty-one".