121102221101909 has 2 divisors, whose sum is σ = 121102221101910. Its totient is φ = 121102221101908.

The previous prime is 121102221101809. The next prime is 121102221102053. The reversal of 121102221101909 is 909101122201121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114500764453009 + 6601456648900 = 10700503^2 + 2569330^2 .

It is a cyclic number.

It is not a de Polignac number, because 121102221101909 - 2³² = 121097926134613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121102221101809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551110550954 + 60551110550955.

It is an arithmetic number, because the mean of its divisors is an integer number (60551110550955).

Almost surely, 2^{121102221101909} is an apocalyptic number.

It is an amenable number.

121102221101909 is a deficient number, since it is larger than the sum of its proper divisors (1).

121102221101909 is an equidigital number, since it uses as much as digits as its factorization.

121102221101909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 121102221101909 in words is "one hundred twenty-one trillion, one hundred two billion, two hundred twenty-one million, one hundred one thousand, nine hundred nine".