2134220021 has 2 divisors, whose sum is σ = 2134220022. Its totient is φ = 2134220020.

The previous prime is 2134219999. The next prime is 2134220029. The reversal of 2134220021 is 1200224312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2133516100 + 703921 = 46190^2 + 839^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134220021 - 2¹⁰ = 2134218997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2134220029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067110010 + 1067110011.

It is an arithmetic number, because the mean of its divisors is an integer number (1067110011).

Almost surely, 2^2134220021 is an apocalyptic number.

It is an amenable number.

2134220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2134220021 is an equidigital number, since it uses as much as digits as its factorization.

2134220021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2134220021 is about 46197.6192135482. The cubic root of 2134220021 is about 1287.4975063388.

Adding to 2134220021 its reverse (1200224312), we get a palindrome (3334444333).

The spelling of 2134220021 in words is "two billion, one hundred thirty-four million, two hundred twenty thousand, twenty-one".