121221024101 has 2 divisors, whose sum is σ = 121221024102. Its totient is φ = 121221024100.

The previous prime is 121221024073. The next prime is 121221024137. The reversal of 121221024101 is 101420122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120804904900 + 416119201 = 347570^2 + 20399^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221024101 - 2¹⁴ = 121221007717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121221024101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221024151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610512050 + 60610512051.

It is an arithmetic number, because the mean of its divisors is an integer number (60610512051).

Almost surely, 2^121221024101 is an apocalyptic number.

It is an amenable number.

121221024101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221024101 is an equidigital number, since it uses as much as digits as its factorization.

121221024101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121221024101 its reverse (101420122121), we get a palindrome (222641146222).

The spelling of 121221024101 in words is "one hundred twenty-one billion, two hundred twenty-one million, twenty-four thousand, one hundred one".