121000020229909 has 2 divisors, whose sum is σ = 121000020229910. Its totient is φ = 121000020229908.

The previous prime is 121000020229883. The next prime is 121000020230017. The reversal of 121000020229909 is 909922020000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75067547207409 + 45932473022500 = 8664153^2 + 6777350^2 .

It is a cyclic number.

It is not a de Polignac number, because 121000020229909 - 2⁵ = 121000020229877 is a prime.

It is a super-3 number, since 3×121000020229909³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121000020229009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500010114954 + 60500010114955.

It is an arithmetic number, because the mean of its divisors is an integer number (60500010114955).

Almost surely, 2^{121000020229909} is an apocalyptic number.

It is an amenable number.

121000020229909 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000020229909 is an equidigital number, since it uses as much as digits as its factorization.

121000020229909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 121000020229909 in words is "one hundred twenty-one trillion, twenty million, two hundred twenty-nine thousand, nine hundred nine".