2205100421 has 2 divisors, whose sum is σ = 2205100422. Its totient is φ = 2205100420.

The previous prime is 2205100399. The next prime is 2205100427. The reversal of 2205100421 is 1240015022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1746069796 + 459030625 = 41786^2 + 21425^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205100421 - 2⁶ = 2205100357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2205100421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2205100427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102550210 + 1102550211.

It is an arithmetic number, because the mean of its divisors is an integer number (1102550211).

Almost surely, 2^2205100421 is an apocalyptic number.

It is an amenable number.

2205100421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2205100421 is an equidigital number, since it uses as much as digits as its factorization.

2205100421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 2205100421 is about 46958.4967923804. The cubic root of 2205100421 is about 1301.5957565728.

Adding to 2205100421 its reverse (1240015022), we get a palindrome (3445115443).

The spelling of 2205100421 in words is "two billion, two hundred five million, one hundred thousand, four hundred twenty-one".