2205102421 has 2 divisors, whose sum is σ = 2205102422. Its totient is φ = 2205102420.

The previous prime is 2205102413. The next prime is 2205102439. The reversal of 2205102421 is 1242015022.

2205102421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2202894225 + 2208196 = 46935^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205102421 - 2³ = 2205102413 is a prime.

It is a super-2 number, since 2×2205102421² = 9724953374200122482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2205102121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102551210 + 1102551211.

It is an arithmetic number, because the mean of its divisors is an integer number (1102551211).

Almost surely, 2^2205102421 is an apocalyptic number.

It is an amenable number.

2205102421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2205102421 is an equidigital number, since it uses as much as digits as its factorization.

2205102421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2205102421 is about 46958.5180877762. The cubic root of 2205102421 is about 1301.5961500834.

Adding to 2205102421 its reverse (1242015022), we get a palindrome (3447117443).

The spelling of 2205102421 in words is "two billion, two hundred five million, one hundred two thousand, four hundred twenty-one".