6261322121 has 2 divisors, whose sum is σ = 6261322122. Its totient is φ = 6261322120.

The previous prime is 6261322069. The next prime is 6261322129. The reversal of 6261322121 is 1212231626.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4086405625 + 2174916496 = 63925^2 + 46636^2 .

It is a cyclic number.

It is not a de Polignac number, because 6261322121 - 2²⁶ = 6194213257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6261322129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3130661060 + 3130661061.

It is an arithmetic number, because the mean of its divisors is an integer number (3130661061).

Almost surely, 2^6261322121 is an apocalyptic number.

It is an amenable number.

6261322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6261322121 is an equidigital number, since it uses as much as digits as its factorization.

6261322121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 6261322121 is about 79128.5164842612. The cubic root of 6261322121 is about 1843.1273730174.

Adding to 6261322121 its reverse (1212231626), we get a palindrome (7473553747).

The spelling of 6261322121 in words is "six billion, two hundred sixty-one million, three hundred twenty-two thousand, one hundred twenty-one".