121221120101 has 2 divisors, whose sum is σ = 121221120102. Its totient is φ = 121221120100.

The previous prime is 121221120079. The next prime is 121221120121. The reversal of 121221120101 is 101021122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121104696001 + 116424100 = 348001^2 + 10790^2 .

It is an emirp because it is prime and its reverse (101021122121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121221120101 - 2⁶ = 121221120037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221120121) 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, 60610560050 + 60610560051.

It is an arithmetic number, because the mean of its divisors is an integer number (60610560051).

Almost surely, 2^121221120101 is an apocalyptic number.

It is an amenable number.

121221120101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221120101 is an equidigital number, since it uses as much as digits as its factorization.

121221120101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121221120101 its reverse (101021122121), we get a palindrome (222242242222).

The spelling of 121221120101 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred one".