210232111120721 has 2 divisors, whose sum is σ = 210232111120722. Its totient is φ = 210232111120720.

The previous prime is 210232111120693. The next prime is 210232111120751. The reversal of 210232111120721 is 127021111232012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170088938494225 + 40143172626496 = 13041815^2 + 6335864^2 .

It is a cyclic number.

It is not a de Polignac number, because 210232111120721 - 2⁶ = 210232111120657 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 (210232111120751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105116055560360 + 105116055560361.

It is an arithmetic number, because the mean of its divisors is an integer number (105116055560361).

Almost surely, 2^{210232111120721} is an apocalyptic number.

It is an amenable number.

210232111120721 is a deficient number, since it is larger than the sum of its proper divisors (1).

210232111120721 is an equidigital number, since it uses as much as digits as its factorization.

210232111120721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

Adding to 210232111120721 its reverse (127021111232012), we get a palindrome (337253222352733).

The spelling of 210232111120721 in words is "two hundred ten trillion, two hundred thirty-two billion, one hundred eleven million, one hundred twenty thousand, seven hundred twenty-one".