121220122101109 has 2 divisors, whose sum is σ = 121220122101110. Its totient is φ = 121220122101108.

The previous prime is 121220122100983. The next prime is 121220122101131. The reversal of 121220122101109 is 901101221022121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117991082016900 + 3229040084209 = 10862370^2 + 1796953^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220122101109 - 2¹⁷ = 121220121970037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220122107109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610061050554 + 60610061050555.

It is an arithmetic number, because the mean of its divisors is an integer number (60610061050555).

Almost surely, 2^{121220122101109} is an apocalyptic number.

It is an amenable number.

121220122101109 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220122101109 is an equidigital number, since it uses as much as digits as its factorization.

121220122101109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 121220122101109 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred one thousand, one hundred nine".