122101101721 has 2 divisors, whose sum is σ = 122101101722. Its totient is φ = 122101101720.

The previous prime is 122101101659. The next prime is 122101101797. The reversal of 122101101721 is 127101101221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88111017225 + 33990084496 = 296835^2 + 184364^2 .

It is a cyclic number.

It is not a de Polignac number, because 122101101721 - 2⁷ = 122101101593 is a prime.

It is not a weakly prime, because it can be changed into another prime (122101701721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61050550860 + 61050550861.

It is an arithmetic number, because the mean of its divisors is an integer number (61050550861).

Almost surely, 2^122101101721 is an apocalyptic number.

It is an amenable number.

122101101721 is a deficient number, since it is larger than the sum of its proper divisors (1).

122101101721 is an equidigital number, since it uses as much as digits as its factorization.

122101101721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 122101101721 its reverse (127101101221), we get a palindrome (249202202942).

The spelling of 122101101721 in words is "one hundred twenty-two billion, one hundred one million, one hundred one thousand, seven hundred twenty-one".